Dockerfile User Permissions

Docker fileの書き方、仕組みを理解する。 Dockerを0から勉強する ではDockerfileを使わない方法を記載しています. I‘m a new Linux sys admin and I’m unable to find the command to list all users on my RHEL server. What docker users need to know to move from Docker to Podman and Buildah and the advantages of doing so. To use this, you will need to have Docker set up. Administrators have permission to view, edit, share, or delete all of the resources created in the account. 0 (December 16, 2018) Applying the Docker Spring Boot application plugin with the plugins DSL should not fail - Issue 702. Repo Description Provides a Dockerfile and associated scripts for configuring an instance of Apache NiFi to run with certificate authentication. Check Linux Wiki for more information about changing permissions. I came across a slow connection when downloading software using yum building a docker image with Dockerfile. Dockerfile: RUN vs CMD vs ENTRYPOINT. NOTE : Ensures that bash is the default. This page is a scratchpad for Terri's Dockerfile, which sets up a very default version of Mailman in your container so that you can try out Mailman 3 suite. Dockerfile reference for the USER instruction. We can’t wait to see what you build with it. Starting with Pipeline versions 2. Introducing Dockerfile Image Update. Use Dockerfile and create Docker images automatically. This is because Docker has limited access to the filesystem on the host computer. Every file and directory in your UNIX/Linux system has following 3 permissions defined for all the 3 owners discussed above. Extending access and permissions to other Skytap users. Creating the Dockerfile. When using the USER directive in Dockerfile, all subsequent commands are forced to run as the specified user. Hi Developers! Those who use Dockerfile to work with InterSystems IRIS often need to execute several lines of ObjectScript. this works locally but I'm wondering if it works on bluemix. $ docker build -t docker-whale. Instead, anyone can base their own Docker image off of the HDP SB by using the "FROM" directive in their own Dockerfile once they have the sandbox Docker image (from the Hortonworks download page). In some cases once a layer is created, the permissions for that layer's files can not be modified. raspberrypi3 and Dockerfile. A Dockerfile for Composer (a dependency manager for PHP) so that users don't have to do it themselves as the image doesn't , at the top of the Dockerfile. Today somebody ask in the IIS. The second step is to set in the Dockerfile just copied the correct version of the jar file to be included in the docker image. It can only access the directory from which it was called, not my entire home dir. Linux master Linux Slave Jenkins 1. This tutorial will concentrate on how to build a custom Docker image based on Ubuntu with Apache service installed. Using docker build users can create an automated build that executes several command-line instructions in succession. I need an image with all the 3 elements combined in one container. yml and it will print out a Dockerfile: ruby dockerfile-generator. The Docker engine includes tools that automate container image creation. Users often modify their environment after a container has been started. Given user permissions change fairly frequently (as does project ownership) this doesn't seem like the safest or most sustainable way of solving the problem. If you confront the user with a lot of requests for permissions at once, you may overwhelm the user and cause them to quit your app. Resolution. The ENTRYPOINT or CMD that you specify in your Dockerfile identify the default executable for your image. 05/03/2019; 10 minutes to read +3; In this article. How to add a user to the sudoers list: Open a Root Terminal and type visudo (to access and edit the list). AWS Secrets Manager is a simple and powerful way to handle secrets (such as database username/password credentials). A Dockerfile (no file extension) is a definition file that will build and run a container. I'm building a Docker image for my Symfony app and I need to give permission to apache server to write into cache and log folders #Dockerfile FROM php:7-apache RUN. While this. Docker builds images by reading instructions from a Dockerfile. If higher than basic user permissions, then the higher permissions take precedence. The Solution Use su {USER} -c "commands go here" instead to execute commands as a different user. The Docker engine includes tools that automate container image creation. The Solution Use su {USER} -c "commands go here" instead to execute commands as a different user. How to Add and Delete Users on Ubuntu 18. All items are optional. Edit the Dockerfile that creates a non-root privilege user and modify the default root user to the newly-created non-root privilege user, as shown here:. However, the user has the option to override either of these values at run time. Either password, reset_password, or force_random_password must be specified. sudo usermod -a -G docker ec2-user; Log out and log back in again to pick up the new docker group permissions. If a service can run without privileges, use USER to change to a non-root user. It also allows you to write code in any other language that can handle incoming HTTP requests ( example ). Dockerfile that attempts to run the app as non-root user. Sign up to join this community. Only grant this privilege to trusted users. Starter An Open Source Dockerfile Generator View on GitHub. So when I run the container manually I don't have to perform -p 8888:8888 (also not because I don't want to map my api of nodejs on my real server). The remaining piece is that the specified user must be able to start the notebook, which requires certain permissions like being able to write to the home directory. 'docker run' throws "exec user process" errors charset , docker , docker on windows , linefeed , unicode When recently creating a Linux Docker image using Docker for Windows , I ran into a couple of vague errors. Instead, anyone can base their own Docker image off of the HDP SB by using the "FROM" directive in their own Dockerfile once they have the sandbox Docker image (from the Hortonworks download page). VERSION-installer-linux-x86_64. But this seems more like a hack. This process is very similar to a compilation of a source code into a binary output, but in this case the output of the Dockerfile will be a container image. This change to the non-root user can be accomplished using the -u or –user option of the docker run subcommand or the USER instruction in the Dockerfile. Ansible Container enables you to build container images and orchestrate them using only Ansible playbooks. Note only administrators can create new users. NET Core application with user authentication. Welcome to Starter. What you are. Edit the Dockerfile that creates a non-root privilege user and modify the default root user to the newly-created non-root privilege user, as shown here:. However some developers, especially newbies, still get confused when looking at the instructions that are available for use in a Dockerfile, because there are a few that may initially appear to be redundant (or, at least, have significant overlap). mehmetatas Apr 29, 2018. Docker build command Docker build command is used to build an image from a Dockerfile. json file below:. We need to add an admin account to administer things from outside of the container. If you are running as a non-root user, you'll need to ensure your Dockerfile creates ~/. Write a Lambda function that will c. Syntax docker build [OPTIONS] [Dockerfile PATH|URL] Example Let's create an example Dockerfile in your current directory. Here, he shares his knowledge with you. Introduction. For example, if your image is derived from an image that uses a non-root user swuser, then RUN commands in your Dockerfile will run as swuser. Dockerfile for default-image:2. 5 and later of Docker. Either password, reset_password, or force_random_password must be specified. Write a Lambda function that will c. Reference - Best Practices. In this directory, you should keep all the project files and a Dockerfile. You can run "oc new-app GIT_REPO -o yaml --dry-run" to see what new-app generates, and pipe that directly into the export command:. However, when you deploy to production, make sure your code is included in the Docker image itself with the proper permissions set so you won't have the need for the acl packages which could present a security vulnerability down the road. /foo /foo in the container will be owned by root, not by 'foo' as one might expect. Introducing Dockerfile Image Update. While you can create container images manually by running the docker commit command, adopting an automated image creation process has many benefits, including:. User rights and user groups form the backbone of MediaWiki's user permissions system. Docker for Mac are NOT supported due to OpenGL forwarding. The advantage of a Dockerfile over just storing the binary. Essentially, it's a convenience feature and allows multiple docker client commands to communicate to the same daemon process internally. The default user in a Dockerfile is the user of the parent image. The Solution Use su {USER} -c "commands go here" instead to execute commands as a different user. With a Dockerfile constructed, you could then easily build the same image over and over, without. Instead, anyone can base their own Docker image off of the HDP SB by using the "FROM" directive in their own Dockerfile once they have the sandbox Docker image (from the Hortonworks download page). The Dockerfile is essentially the build instructions to build the image. There are easy workaround but it's still a inconsistency which should be fixed a. Are there any tools that support this ?. Learning how to manage users effectively is an essential skill for any Linux system administrator. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Users can migrate these values to the new system by: Publishing a new Docker image with the fixes already applied and referencing this complete image in Beakers nodeset file; Taking a copy of the reference Dockerfile for the platform being managed and adding the required entries back, then feeding this new file to Beaker with the dockerfile key. Build an image using dockerfile: To build the image we will run docker build. Here is what I have used, which worked well. Hi , is there anyway to find latest dockerfile or can NVIDIA open Dockerfile source ? This can help us to run a same environment prior run it on AWS, since once VM created , it start to charge money, and i'd like to verify same docker environment with local build of Dockerfile firstly. How solve permission problems for docker in ubuntu? you need to have proper. Dockerfile: RUN vs CMD vs ENTRYPOINT. So everything is fine if I just run the application using docker run. Combining ADD and VOLUME on a nodejs Dockerfile. What directories should be writable by the application? Adapt them by giving writing permissions to the non-root users. Useful for non-techy Linux users If you want to have the latest Monero software you have two options: wait for a release or compile it by yourself. 09 one can use the --chown flag on ADD/COPY operations in Dockerfile to change the owner in the ADD/COPY step itself rather than a separate RUN operation with chown which increases the size of the image as you have noted. Once you've installed the extension, and Visual Studio Code is up and running, let's see what it can do by creating a Dockerfile we can use to build a new container image. The docker daemon binds to a Unix socket instead of a TCP port. Since Docker 17. For me, this was a game of "escaping this and that" every time just to shoot a few commands on ObjectScript to IRIS. Then you’ll build your image from the Dockerfile and start up your containers. I would say that this Dockerfile is quite obsolete as a representation of setting up MGW. How to add a file as a volume using Dockerfile format. Using #PowerShell Direct to Circumvent the USER Directive in Dockerfile #WindowsContainer Published on 02 Jul 2017 Tags #PowerShell #Docker #Container #Windows Container. How solve permission problems for docker in ubuntu? you need to have proper. Docker is a very popular container platform that lets you easily package, deploy, and consume applications and services. We need to add an admin account to administer things from outside of the container. Super User is a question and answer site for computer enthusiasts and power users. The idea is this one: I have today an analysis that works (for example contained in a. Docker containers are always run as root user by default. More people have experienced this issue and others will do in future. It looks like there is no way to specify a directory to build an image using the "dockerfile" option. I’m a Windows guy. But however I Google'd or searched over Docker Hub there I found no images to hold PHP, Apache and MySQL in the same container / Dockerfile. We were following many of the suggestions but there was still room for improvement. When using Dockerfiles, the process of building an image is automated as Docker reads the commands (instructions) from a Dockerfile and executes them in s. Developer Community for Visual Studio Product family. Dockerfile reference for the USER instruction. Dockerize your Java Application. Solution: It's much better to run as a non-root user, and do so in the image itself so that you don't listen on ports<1024 or do other operations that require a subset of root's permissions. commands for running apk, apt-get, pip, and other package providers. Build an image using dockerfile: To build the image we will run docker build. It only takes a few minutes to set up! If you have questions about ASP. It's not ideal, but it is a workaround in light of no source Dockerfile. Running a docker container as a non-root user. Home › Cloud › Docker Q&A for Windows Users. ( Note: I am not sure the precise nature of which cases lead to being able to vs not. Combining ADD and VOLUME on a nodejs Dockerfile. The first thing is to be expected. sudo usermod -a -G docker ec2-user; Log out and log back in again to pick up the new docker group permissions. It used yum repo for installation of packages. 從映像檔產生 Dockerfile. desktop can be used for easy installation. Using docker build users can create an automated build that executes several command-line instructions in succession. If you are using an ubuntu or debian based container image, you can create a user easily with the following directives somewhere in your Dockerfile:. Dockerfile and supporting scripts to extend the Oracle WebLogic Server install image and create an Oracle WebLogic Server domain image. 從映像檔產生 Dockerfile. Combining ADD and VOLUME on a nodejs Dockerfile. 3、RUN(运行命令) RUN可以运行任何被基础image支持的命令。. Sometimes, while working on the Linux command line, you might want to quickly check which all users are currently logged in to the system. Docker images can be automatically build form text files, named Dockerfiles. The filesystem is actually composed from the read-only image layers, the writeable container layer and any volumes. Solution: It's much better to run as a non-root user, and do so in the image itself so that you don't listen on ports<1024 or do other operations that require a subset of root's permissions. Docker is one of the key technologies in the resin. FROM starts the Dockerfile. Steps to reproduce the issue: Dockerfile: FROM ubuntu RUN useradd tester USER tester RUN mkdir -p /test docker build -t testtemp. But however I Google'd or searched over Docker Hub there I found no images to hold PHP, Apache and MySQL in the same container / Dockerfile. By default that Unix socket is owned by the user root and other users can only access it using sudo. commands for running apk, apt-get, pip, and other package providers. Reference - Best Practices. The advantage of a Dockerfile over just storing the binary image (or a snapshot/template in other virtualization systems) is that the automatic builds will ensure you have the latest version available. In my last post, I explained how to install Docker and how to run containers. What we can do is create an additional service account which is the only user with anyuid permissions, then we can assign the specific deployment configuration for the pods to this user. Unix authentication is required so you'll also need a Unix record for the host running the docker. Can I answer any specific questions about the Dockerfile, MGW configuration, etc. Starting with Pipeline versions 2. within the directory where the dockerfile is located. Create an Image from the Dockerfile; Use the Image to create a container and check if the file exists. However, those values can be overridden by providing single environment variables, or env_files, from which environment variables are parsed and passed into the container. In this we've named our dockerfile something other than dockerfile then we would type docker build to build the image. Arm-based building is only available for Open Source repositories (at both travis-ci. The wordpress docker image Dockerfile mounts a volume using the following command 'VOLUME /var/www/html'. the permissions of the user copying the files. Add folder-level permissions to a room mailbox by using the Add-MailboxFolderPermission cmdlet. To confirm which user your build runs as you can run the whoami command as a part of your build process. Docker can build images by reading instruction from a Dockerfile. When using the USER directive in Dockerfile, all subsequent commands are forced to run as the specified user. So, let's build a very basic Dockerfile for R, focused on reproducibility. This Dockerfile should contain: user contributions licensed under cc by-sa 4. The Docker team has pulled 17 Docker container images that have been backdoored and used to install reverse shells and cryptocurrency miners on users' servers for the past year. We recommend the first solution. NET Core that need user authentication, check out my tutorial Build an ASP. 5 and higher, Pipeline has built-in support for interacting with Docker from within a Jenkinsfile. The user running Bamboo can't access the docker engine, because it is lacking permissions to access the unix socket to communicate with the engine. Only grant this privilege to trusted users. The user may also see different tools that provide interfaces to perform specialized tasks, such as JupyterLab, RStudio, RISE and others. Dockerfile reference for the USER instruction. ###Overview Dockerfiles are text files that store the commands you would execute on the command line inside a container to create a Docker image. What you are. When using Dockerfiles, the process of building an image is automated as Docker reads the commands (instructions) from a Dockerfile and executes them in s. Hi Developers! Those who use Dockerfile to work with InterSystems IRIS often need to execute several lines of ObjectScript. Create a new text file called Dockerfile at users-service/ with the content below:. Welcome to Starter. If you want to run processes as multiple users inside a container, you can create users in your Dockerfile with RUN net user /create , set file ACLs, then configure processes to run with that user using the Dockerfile USER directive. Users can migrate these values to the new system by: Publishing a new Docker image with the fixes already applied and referencing this complete image in Beakers nodeset file; Taking a copy of the reference Dockerfile for the platform being managed and adding the required entries back, then feeding this new file to Beaker with the dockerfile key. For example, if your image is derived from an image that uses a non-root user swuser, then RUN commands in your Dockerfile will run as swuser. Example Dockerfile This example creates a custom WildFly container with a custom administrative user. To learn more about this API type please refer to the security context constraints (SCCs) architecture documentation. Read: This permission give you the authority to open and read a file. The ENTRYPOINT or CMD that you specify in your Dockerfile identify the default executable for your image. While this. But this program is not fully privileged. Can I answer any specific questions about the Dockerfile, MGW configuration, etc. However, the user has the option to override either of these values at run time. With USER, we can define the user to be used to execute a command like USER dan. TIP: Add the nonroot user to the root group. 09 one can use the --chown flag on ADD/COPY operations in Dockerfile to change the owner in the ADD/COPY step itself rather than a separate RUN operation with chown which increases the size of the image as you have noted. With the current HDP sandbox, there is no source Dockerfile. Arthur Ulfeldt uses Docker to run complex systems with millions of users and hundreds of containers. ###Overview Dockerfiles are text files that store the commands you would execute on the command line inside a container to create a Docker image. ( Note: I am not sure the precise nature of which cases lead to being able to vs not. Learn how to create a Dockerfile for running Elasticsearch, and a few more things that you need to consider. Repo Description Provides a Dockerfile and associated scripts for configuring an instance of Apache NiFi to run with certificate authentication. raspberrypi3 will be selected as an exact match and for all other devices the builder will automatically select Dockerfile. To sign up for our weekly newsletter filled with great updates from Docker, our users and ecosystem, please submit your email below. Create a new text file called Dockerfile at users-service/ with the content below:. You may manage SCCs in your instance as normal API objects using the CLI. Unix authentication is required so you'll also need a Unix record for the host running the docker. First, we have to create a project directory. The image will for example determine what Linux software (curl, vim …), programming. Whenever you publish the application to balenaCloud, if the device-type is a Raspberry Pi 3, Dockerfile. If a UID is specified, the container will start as that user, and if no UID is specified it will start as a default user with a random UID that should not collide with any existing users in docker images. The first thing is to be expected. properties are different in the development and deployment environment. NET Core that need user authentication, check out my tutorial Build an ASP. I’m happy to help!. A Docker file contains step-by-step ordered. It only takes a few minutes to set up! If you have questions about ASP. He introduces the basics of Docker, including its containers, Dockerfiles (or base images), and capabilities for networking, data management, infrastructure optimization, and more. Permissions. Using the same baking cake as an analogy, if the image is the recipe, the container as the cake, Dockerfile is the list of ingredients. Description Dockerfile non-root USER doesn't honor files permission. py::test_serializer_is_valid_for_valid_data PASSED [ 7%]. If you’re building applications in ASP. At this point you can either create a new user role, or edit a current one. This comes up #1 on google for “linux add user to group” and I suspect I’m not the only one who completely screwed up their user by running the command you have listed here to “add a user to a group” Perhaps the article should be titled “How to remove a user from all groups and add them to a new group”. For example, editing a post. 1) was released on December 21, 2013. Start by creating the user and group in the Dockerfile with something like RUN groupadd -r postgres && useradd --no-log-init -r -g postgres postgres. Creates a new user. How to Create an Apache Tomcat Docker with a WAR File Uploaded Create a directory for the dockerfile with obclient. Some time ago I encountered an issue where users in AX 2012 were able to modify records even when the security role should have read rights only. The USER instruction sets the user name or UID to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile. Since Docker 17. This is because Docker has limited access to the filesystem on the host computer. please Refer Dockerfile User Documentation. Permissions must be assigned by an Admin for each container. Hi! I don't quite understand how selenium docker images are built. With USER, we can define the user to be used to execute a command like USER dan. Ask Question separate app versions. If higher than basic user permissions, then the higher permissions take precedence. We decided to tackle the problems above by building a tool that would integrate with our CI/CD system. Whether you are a seasoned Docker developer or just getting started, Visual Studio Code makes it easy to author Dockerfile and docker-compose. If you are using an ubuntu or debian based container image, you can create a user easily with the following directives somewhere in your Dockerfile:. Build an image using dockerfile: To build the image we will run docker build. [[email protected] linuxnix-docker]$ docker build. Learn more. If you need your project directories to be located elsewhere, for example on your D:\ drive, you will need to take some extra steps to achieve this. This tutorial will concentrate on how to build a custom Docker image based on Ubuntu with Apache service installed. sh && \ curl -H "User-Agent. Note you cannot `chown` files in a docker 'volume' during the build process, but you can at runtime (as part of your `CMD`) but in that case you can't use the `USER` command to change the UID before `CMD` runs. I‘m a new Linux sys admin and I’m unable to find the command to list all users on my RHEL server. At GitHub, we’re building the text editor we’ve always wanted: hackable to the core, but approachable on the first day without ever touching a config file. Run the following command to create a project directory myapp/ in your users HOME directory and navigate to it: $. The idea is this one: I have today an analysis that works (for example contained in a. The Docker engine includes tools that automate container image creation. Working with Docker. Starter is maintained by Cloud 66. Starting with Pipeline versions 2. Using docker build users can create an automated build that executes several command-line instructions in succession. FROM tomcat的意思是使用tomcat作为基础镜像; 2. This enumerates all files/folders in a directory, checks the ACL for each file/folder and if that ACL contains any NTFS permission for a specified user. Finally, we run the Spotify Dockerfile Maven plugin to build/push the docker image. As you'll notice, setting up user permissions requires some planning but once OUs and User group permissions are defined then the task is easier. Even prior to version 0. we see that our original user still owns the Dockerfile. It is bad practice to run processes in containers as root, and on binder we do not allow root container processes. Using #PowerShell Direct to Circumvent the USER Directive in Dockerfile #WindowsContainer Published on 02 Jul 2017 Tags #PowerShell #Docker #Container #Windows Container. I would say that this Dockerfile is quite obsolete as a representation of setting up MGW. Making users in Linux isn't necessarily as simple as making a username, and giving it a password. More than 3 years have passed since last update. Docker is a set of platform-as-a-service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. User rights are bundled into user groups, which correspond to the various roles on the. Introducing Dockerfile Image Update. Introduction. If you do not do this, the folder will be owned by root and your connection will fail with a permissions issue. A Docker file contains step-by-step ordered. Docker Toolbox expects that your data volumes will be within C:\Users. yml Specifications. It would have been good to have this as the default mode i. Dockerfile Builds. NET Core application with user authentication. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Our system was already building, testing, and publishing our Docker images, so why not add an extra step that would scan our GitHub repositories and send pull requests to all of the projects that need to be rebuilt?. Start by creating the user and group in the Dockerfile with something like RUN groupadd -r postgres && useradd --no-log-init -r -g postgres postgres. Build an image using dockerfile: To build the image we will run docker build. The wordpress docker image Dockerfile mounts a volume using the following command 'VOLUME /var/www/html'. An example Dockerfile. Once you have learned the basics of working with Docker, the next step is to learn how to create and save your own images. Description Dockerfile non-root USER doesn't honor files permission. A Dockerfile is a recipe that tells the Docker engine how to build your image. I'm a new Linux sys admin and I'm unable to find the command to list all users on my RHEL server. The USER instruction sets the user name or UID to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile. User rights are bundled into user groups, which correspond to the various roles on the. The advantage of a Dockerfile over just storing the binary. Disclaimer: this blog post is an introduction to Docker for beginners, and will takes some shortcuts ;). So, our first question simply is, what is a Dockerfile? When you ran the docker run command and specified WordPress, Docker uses this file to build the image itself. What is Dockerfile and how to Create it? A Dockerfile is a text document that contains all the commands which assemble to create a Docker Image. I'm building a Docker image for my Symfony app and I need to give permission to apache server to write into cache and log folders #Dockerfile FROM php:7-apache RUN. To change file mode, bits. Creates a new user. The first public beta version of Docker Compose (version 0. Introduction. The user may also see different tools that provide interfaces to perform specialized tasks, such as JupyterLab, RStudio, RISE and others. The docker daemon binds to a Unix socket instead of a TCP port. I need to copy or clone file ownership and permissions from another file on Linux. So when I run the container manually I don't have to perform -p 8888:8888 (also not because I don't want to map my api of nodejs on my real server). unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx C:\Users\Villanueva\Test\testdocker\Dockerfile: The system cannot find the file specified. Starter is maintained by Cloud 66. Developer Community for Visual Studio Product family. sudo usermod -a -G docker ec2-user; Log out and log back in again to pick up the new docker group permissions. dのPermission deniedが解消されず、Dockerfileを見直しています。. I'm happy to help!. It is also useful for configuration management. docker file-permissions dockerfile. AWS Secrets Manager is a simple and powerful way to handle secrets (such as database username/password credentials). For more details visit our Dockerfile and Dockerfile directives tutorial. Repo Description Provides a Dockerfile and associated scripts for configuring an instance of Apache NiFi to run with certificate authentication. If the user is running Android 6. This post is the draft of the vignette for a new R package by o2r team members Matthias and Daniel. NET Core + Docker, leave me a comment below, or ping me on twitter at @nbarbettini. How solve permission problems for docker in ubuntu? you need to have proper. You may manage SCCs in your instance as normal API objects using the CLI. Consider an explicit UID/GID. 09 one can use the --chown flag on ADD/COPY operations in Dockerfile to change the owner in the ADD/COPY step itself rather than a separate RUN operation with chown which increases the size of the image as you have noted. Code simplification. Working with Dockerfile.