Install Composer Docker

  1. Install Composer Alpine Docker
  2. Install Composer Docker For Windows
  3. Composer

MVC Skeleton Application

Docker is an open source project, released under the Apache License, version 2. Note that, while your package repositories could have a package called docker, it is probably not the Docker we are talking about. The Docker package could be called docker.io or docker-engine. For information about installing Docker, see Get Docker in Docker. Install Docker Compose on Ubuntu. Follow the steps below to install the latest Docker Compose version from its official GitHub repository. At the time of writing, Docker Compose 1.29.2 is the latest stable release.

On ubuntu had to run sudo apt-get build-essential -y gcc docker-enter.c -o docker-enter sudo./docker-enter container-id Nice that I dont have to get the full ID like with lxc-attach -n Codebase is short enough that one can scan the entirety quickly to look for anything malicious. The procedure to install Docker is as follows: Open the terminal application or login to the remote box using ssh command: ssh [email protected]; Type the following command to install Docker via yum provided by Red Hat: sudo yum install docker; Type the following command to install the latest version of Docker CE (community edition).

If you want to use zend-mvc to build Model-View-Controller (MVC) applications, we recommend you start with our skeleton application.

Installation using Composer

The easiest way to create a new Zend Framework project is to use Composer. If you don't have it already installed, then please install it per their documentation.

To create your new Zend Framework project:

Once installed, you can test it out immediately using PHP's built-in web server:

This will start the PHP cli-server on port 8080, and bind it to all network interfaces.

Note: The built-in CLI server is for development only.

Using Vagrant

This skeleton includes a Vagrantfile based on Ubuntu 14.04, and using the ondrej/php PPA to provide PHP 7.0. Start it up using:

Once built, you can also run composer within the box. For example, the following will install dependencies:

While this will update them:

While running, Vagrant maps your host port 8080 to port 80 on the virtual machine; you can visit the site at http://localhost:8080/

Using docker-compose

The skeleton also provides a docker-compose.yml for use with docker-compose; it uses the Dockerfile provided as its base. Build and start the image using:

At this point, you can visit http://localhost:8080 to see the site running.

You can also run composer from the image. The container environment is named 'zf', so you will pass that value to docker-compose run:

Gitea provides automatically updated Docker images within its Docker Hub organization. It ispossible to always use the latest stable tag or to use another service that handles updatingDocker images.

This reference setup guides users through the setup based on docker-compose, but the installationof docker-compose is out of scope of this documentation. To install docker-compose itself, followthe official install instructions.

Install Composer Alpine Docker

Table of Contents


The most simple setup just creates a volume and a network and starts the gitea/gitea:latestimage as a service. Since there is no database available, one can be initialized using SQLite3.Create a directory like gitea and paste the following content into a file named docker-compose.yml.Note that the volume should be owned by the user/group with the UID/GID specified in the config file.If you don’t give the volume correct permissions, the container may not start.Also be aware that the tag :latest will install the current development version.For a stable release you can use :1 or specify a certain release like :1.13.3.

Install Composer Docker For Windows


To bind the integrated openSSH daemon and the webserver on a different port, adjustthe port section. It’s common to just change the host port and keep the ports withinthe container like they are.


MySQL database

To start Gitea in combination with a MySQL database, apply these changes to thedocker-compose.yml file created above.

PostgreSQL database

To start Gitea in combination with a PostgreSQL database, apply these changes tothe docker-compose.yml file created above.

Named volumes

To use named volumes instead of host volumes, define and use the named volumewithin the docker-compose.yml configuration. This change will automaticallycreate the required volume. You don’t need to worry about permissions withnamed volumes; Docker will deal with that automatically.

MySQL or PostgreSQL containers will need to be created separately.



To start this setup based on docker-compose, execute docker-compose up -d,to launch Gitea in the background. Using docker-compose ps will show if Giteastarted properly. Logs can be viewed with docker-compose logs.

To shut down the setup, execute docker-compose down. This will stopand kill the containers. The volumes will still exist.

Notice: if using a non-3000 port on http, change app.ini to matchLOCAL_ROOT_URL = http://localhost:3000/.


After starting the Docker setup via docker-compose, Gitea should be available using afavorite browser to finalize the installation. Visit http://server-ip:3000 and follow theinstallation wizard. If the database was started with the docker-compose setup asdocumented above, please note that db must be used as the database hostname.

Environment variables

You can configure some of Gitea’s settings via environment variables:

(Default values are provided in bold)

  • APP_NAME: “Gitea: Git with a cup of tea”: Application name, used in the page title.
  • RUN_MODE: prod: Application run mode, affects performance and debugging. Either “dev”, “prod” or “test”.
  • DOMAIN: localhost: Domain name of this server, used for the displayed http clone URL in Gitea’s UI.
  • SSH_DOMAIN: localhost: Domain name of this server, used for the displayed ssh clone URL in Gitea’s UI. If the install page is enabled, SSH Domain Server takes DOMAIN value in the form (which overwrite this setting on save).
  • SSH_PORT: 22: SSH port displayed in clone URL.
  • SSH_LISTEN_PORT: %(SSH_PORT)s: Port for the built-in SSH server.
  • DISABLE_SSH: false: Disable SSH feature when it’s not available. If you want to disable SSH feature, you should set SSH port to 0 when installing Gitea.
  • HTTP_PORT: 3000: HTTP listen port.
  • ROOT_URL: ': Overwrite the automatically generated public URL. This is useful if the internal and the external URL don’t match (e.g. in Docker).
  • LFS_START_SERVER: false: Enables git-lfs support.
  • DB_TYPE: sqlite3: The database type in use [mysql, postgres, mssql, sqlite3].
  • DB_HOST: localhost:3306: Database host address and port.
  • DB_NAME: gitea: Database name.
  • DB_USER: root: Database username.
  • DB_PASSWD: '<empty>”: Database user password. Use `your password` for quoting if you use special characters in the password.
  • INSTALL_LOCK: false: Disallow access to the install page.
  • SECRET_KEY: ': Global secret key. This should be changed. If this has a value and INSTALL_LOCK is empty, INSTALL_LOCK will automatically set to true.
  • DISABLE_REGISTRATION: false: Disable registration, after which only admin can create accounts for users.
  • REQUIRE_SIGNIN_VIEW: false: Enable this to force users to log in to view any page.
  • USER_UID: 1000: The UID (Unix user ID) of the user that runs Gitea within the container. Match this to the UID of the owner of the /data volume if using host volumes (this is not necessary with named volumes).
  • USER_GID: 1000: The GID (Unix group ID) of the user that runs Gitea within the container. Match this to the GID of the owner of the /data volume if using host volumes (this is not necessary with named volumes).

Install Ssh In Docker Container List


Customization files described here shouldbe placed in /data/gitea directory. If using host volumes, it’s quite easy to access thesefiles; for named volumes, this is done through another container or by direct access at/var/lib/docker/volumes/gitea_gitea/_data. The configuration file will be saved at/data/gitea/conf/app.ini after the installation.


❗❗ Make sure you have volumed data to somewhere outside Docker container ❗❗

To upgrade your installation to the latest release:

Managing Deployments With Environment Variables

In addition to the environment variables above, any settings in app.ini can be set or overridden with an environment variable of the form: GITEA__SECTION_NAME__KEY_NAME. These settings are applied each time the docker container starts. Full information here.

These environment variables can be passed to the docker container in docker-compose.yml. The following example will enable an smtp mail server if the required env variables GITEA__mailer__FROM, GITEA__mailer__HOST, GITEA__mailer__PASSWD are set on the host or in a .env file in the same directory as docker-compose.yml:

To set required TOKEN and SECRET values, consider using gitea’s built-in generate utility functions.

SSH Container Passthrough

Since SSH is running inside the container, SSH needs to be passed through from the host to the container if SSH support is desired. One option would be to run the container SSH on a non-standard port (or moving the host port to a non-standard port). Another option which might be more straightforward is to forward SSH connections from the host to the container. This setup is explained in the following.

This guide assumes that you have created a user on the host called git which shares the same UID/ GID as the container values USER_UID/ USER_GID. These values can be set as environment variables in the docker-compose.yml:

Next mount /home/git/.ssh of the host into the container. Otherwise the SSH authentication cannot work inside the container.

Now a SSH key pair needs to be created on the host. This key pair will be used to authenticate the git user on the host to the container.

In the next step a file named /app/gitea/gitea (with executable permissions) needs to be created on the host. This file will issue the SSH forwarding from the host to the container. Add the following contents to /app/gitea/gitea:

To make the forwarding work, the SSH port of the container (22) needs to be mapped to the host port 2222 in docker-compose.yml . Since this port does not need to be exposed to the outside world, it can be mapped to the localhost of the host machine:

Composer install docker build

Setup Ssh In Docker Container

In addition, /home/git/.ssh/authorized_keys on the host needs to be modified. It needs to act in the same way as authorized_keys within the Gitea container. Therefore add the public key of the key you created above (“Gitea Host Key”) to ~/git/.ssh/authorized_keys.This can be done via echo '$(cat /home/git/.ssh/id_rsa.pub)' >> /home/git/.ssh/authorized_keys.Important: The pubkey from the git user needs to be added “as is” while all other pubkeys added via the Gitea web interface will be prefixed with command='/app [...].

The file should then look somewhat like

Install Ssh In Docker Container

Here is a detailed explanation what is happening when a SSH request is made:

  1. A SSH request is made against the host (usually port 22) using the git user, e.g. git clone [email protected]:user/repo.git.
  2. In /home/git/.ssh/authorized_keys , the command executes the /app/gitea/gitea script.
  3. /app/gitea/gitea forwards the SSH request to port 2222 which is mapped to the SSH port (22) of the container.
  4. Due to the existence of the public key of the git user in /home/git/.ssh/authorized_keys the authentication host → container succeeds and the SSH request get forwarded to Gitea running in the docker container.

If a new SSH key is added in the Gitea web interface, it will be appended to .ssh/authorized_keys in the same way as the already existing key.


Install Ssh Key In Docker Container

SSH container passthrough will work only if

Install Ssh Client In Docker Container

  • opensshd is used in the container
  • if AuthorizedKeysCommand is not used in combination with SSH_CREATE_AUTHORIZED_KEYS_FILE=false to disable authorized files key generation
  • LOCAL_ROOT_URL is not changed

Estimated reading time: 9 minutes

Update to the Docker Desktop terms

Professional use of Docker Desktop in large organizations (more than 250 employees or more than $10 million in revenue) requires users to have a paid Docker subscription. While the effective date of these terms is August 31, 2021, there is a grace period until January 31, 2022, for those that require a paid subscription. For more information, see Docker Desktop License Agreement.

Welcome to Docker Desktop for Windows. This page contains information about Docker Desktop for Windows system requirements, download URL, instructions to install and update Docker Desktop for Windows.

Download Docker Desktop for Windows

System requirements

Your Windows machine must meet the following requirements to successfully install Docker Desktop.

WSL 2 backend

  • Windows 10 64-bit: Home or Pro 2004 (build 19041) or higher, or Enterprise or Education 1909 (build 18363) or higher.
  • Enable the WSL 2 feature on Windows. For detailed instructions, refer to the Microsoft documentation.
  • The following hardware prerequisites are required to successfully runWSL 2 on Windows 10:

    • 64-bit processor with Second Level Address Translation (SLAT)
    • 4GB system RAM
    • BIOS-level hardware virtualization support must be enabled in theBIOS settings. For more information, seeVirtualization.
  • Download and install the Linux kernel update package.

Hyper-V backend and Windows containers

  • Windows 10 64-bit: Pro 2004 (build 19041) or higher, or Enterprise or Education 1909 (build 18363) or higher.

    For Windows 10 Home, see System requirements for WSL 2 backend.

  • Hyper-V and Containers Windows features must be enabled.
  • The following hardware prerequisites are required to successfully run ClientHyper-V on Windows 10:

    • 64 bit processor with Second Level Address Translation (SLAT)
    • 4GB system RAM
    • BIOS-level hardware virtualization support must be enabled in theBIOS settings. For more information, seeVirtualization.


Docker only supports Docker Desktop on Windows for those versions of Windows 10 that are still within Microsoft’s servicing timeline.

Containers and images created with Docker Desktop are shared between alluser accounts on machines where it is installed. This is because all Windowsaccounts use the same VM to build and run containers. Note that it is not possible to share containers and images between user accounts when using the Docker Desktop WSL 2 backend.

Nested virtualization scenarios, such as running Docker Desktop on aVMWare or Parallels instance might work, but there are no guarantees. Formore information, see Running Docker Desktop in nested virtualization scenarios.

About Windows containers

Looking for information on using Windows containers?

  • Switch between Windows and Linux containersdescribes how you can toggle between Linux and Windows containers in Docker Desktop and points you to the tutorial mentioned above.
  • Getting Started with Windows Containers (Lab)provides a tutorial on how to set up and run Windows containers on Windows 10, Windows Server 2016 and Windows Server 2019. It shows you how to use a MusicStore applicationwith Windows containers.
  • Docker Container Platform for Windows articles and blogposts on the Docker website.

Install Docker Desktop on Windows

  1. Double-click Docker Desktop Installer.exe to run the installer.

    If you haven’t already downloaded the installer (Docker Desktop Installer.exe), you can get it from Docker Hub. It typically downloads to your Downloads folder, or you can run it from the recent downloads bar at the bottom of your web browser.

  2. When prompted, ensure the Enable Hyper-V Windows Features or the Install required Windows components for WSL 2 option is selected on the Configuration page.

  3. Follow the instructions on the installation wizard to authorize the installer and proceed with the install.

  4. When the installation is successful, click Close to complete the installation process.

  5. If your admin account is different to your user account, you must add the user to the docker-users group. Run Computer Management as an administrator and navigate to Local Users and Groups > Groups > docker-users. Right-click to add the user to the group.Log out and log back in for the changes to take effect.

Start Docker Desktop

Docker Desktop does not start automatically after installation. To start Docker Desktop:

  1. Search for Docker, and select Docker Desktop in the search results.

  2. The Docker menu () displays the Docker Subscription Service Agreement window. It includes a change to the terms of use for Docker Desktop.

    Here’s a summary of the key changes:

    • Our Docker Subscription Service Agreement includes a change to the terms of use for Docker Desktop
    • It remains free for small businesses (fewer than 250 employees AND less than $10 million in revenue), personal use, education, and non-commercial open source projects.
    • It requires a paid subscription for professional use in larger enterprises.
    • The effective date of these terms is August 31, 2021. There is a grace period until January 31, 2022 for those that will require a paid subscription to use Docker Desktop.
    • The existing Docker Free subscription has been renamed Docker Personal and we have introduced a Docker Business subscription .
    • The Docker Pro, Team, and Business subscriptions include commercial use of Docker Desktop.
  3. Click the checkbox to indicate that you accept the updated terms and then click Accept to continue. Docker Desktop starts after you accept the terms.


    If you do not agree to the updated terms, the Docker Desktop application will close and you can no longer run Docker Desktop on your machine. You can choose to accept the terms at a later date by opening Docker Desktop.

    For more information, see Docker Desktop License Agreement. We recommend that you also read the Blog and FAQs to learn how companies using Docker Desktop may be affected.

Quick Start Guide

When the initialization is complete, Docker Desktop launches the Quick Start Guide. This tutorial includes a simple exercise to build an example Docker image, run it as a container, push and save the image to Docker Hub.

To run the Quick Start Guide on demand, right-click the Docker icon in the Notifications area (or System tray) to open the Docker Desktop menu and then select Quick Start Guide.

Congratulations! You are now successfully running Docker Desktop on Windows.


When an update is available, Docker Desktop displays an icon to indicate the availability of a newer version.

Starting with Docker Desktop 4.1.0, the Software Updates section in the General tab also notifies you of any updates available to Docker Desktop. You can choose to download the update right away, or click the Release Notes option to learn what’s included in the updated version. If you are on a Docker Team or a Business subscription, you can turn off the check for updates by clearing the Automatically Check for Updates checkbox in the General settings. This will also disable the notification badge that appears on the Docker Dashboard.

Install composer docker free

To encourage developers to stay up to date, Docker Desktop displays a reminder two weeks after an update becomes available. You can dismiss this daily reminder by clicking Snooze. You can skip an update when a reminder appears by clicking the Skip this update option.

Docker Subscription Service Agreement

Beginning on August 31, 2021, you must agree to the Docker Subscription Service Agreement to continue using Docker Desktop. Read the Blog and the Docker subscription FAQs to learn more about the changes.

Click Download update When you are ready to download the update. This downloads the update in the background. After downloading the update, click Update and restart from the Docker menu. This installs the latest update and restarts Docker Desktop for the changes to take effect.

When Docker Desktop starts, it displays the Docker Subscription Service Agreement window. Read the information presented on the screen to understand how the changes impact you. Click the checkbox to indicate that you accept the updated terms and then click Accept to continue.



If you do not agree to the terms, the Docker Desktop application will close and you can no longer run Docker Desktop on your machine. You can choose to accept the terms at a later date by opening Docker Desktop.

Docker Desktop starts after you accept the terms.

Uninstall Docker Desktop

To uninstall Docker Desktop from your Windows machine:

  1. From the Windows Start menu, select Settings > Apps > Apps & features.
  2. Select Docker Desktop from the Apps & features list and then select Uninstall.
  3. Click Uninstall to confirm your selection.


Uninstalling Docker Desktop destroys Docker containers, images, volumes, andother Docker related data local to the machine, and removes the files generatedby the application. Refer to the back up and restore datasection to learn how to preserve important data before uninstalling.

Where to go next

  • Getting started introduces Docker Desktop for Windows.
  • Get started with Docker is a tutorial that teaches you how todeploy a multi-service stack.
  • Troubleshooting describes common problems, workarounds, andhow to get support.
  • FAQs provide answers to frequently asked questions.
  • Release notes lists component updates, new features, and improvements associated with Docker Desktop releases.
  • Back up and restore data provides instructions on backing up and restoring data related to Docker.


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