README: Init

Signed-off-by: Christopher Crone <[email protected]>

Author: chris-crone

README.md

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+# Docker ACI Integration for Linux (Beta)
+
+Docker has extended its strategic collaboration with Microsoft to simplify code
+to cloud application development for developers and development teams by more
+closely integrating with Azure Container Instances (ACI).
+
+The new ACI experience from local VS Code and Docker Desktop development to
+remote deployment in ACI creates a tighter integration between Docker and
+Microsoft developer technologies provides the following productivity benefits to
+developers:
+
+* Easily log into Azure directly from the Docker CLI
+* Trigger an ACI cloud container service environment to be set up automatically
+  with easy to use defaults and no infrastructure overhead
+* Switch from a local context to a cloud context to quickly and easily run
+  applications
+* Simplifies single container and multi-container application development via
+  the Compose specification allowing a developer to invoke fully Docker
+  compatible commands seamlessly for the first time natively within a cloud
+  container service
+
+> :warning: **This CLI is in beta**: The installation process, commands, and
+> flags will change in future releases.
+
+## Installation
+
+This guide shows how to install the CLI for Ubuntu. For macOS and Windows, the
+CLI is included with the Desktop Edge release.
+
+### Prerequisites
+
+* [Docker 19.03 or later](https://docs.docker.com/get-docker/)
+
+### Install script
+
+You can install the new CLI using the install script:
+
+```console
+curl -L https://github.com/docker/aci-integration-beta/releases/download/v0.1.0/install.sh | sh
+```
+
+### Manual install
+
+You can download the Docker ACI Integration CLI using the following command:
+
+```console
+curl -Lo docker-aci https://github.com/docker/aci-integration-beta/releases/download/v0.1.0/docker-linux-amd64
+```
+
+You will then need to make it executable:
+
+```console
+chmod +x docker-aci
+```
+
+To enable using the local Docker Engine and to use existing Docker contexts, you
+will need to have the existing Docker CLI as `com.docker.cli` somewhere in your
+`PATH`. You can do this by creating a symbolic link from the existing Docker
+CLI.
+
+```console
+ln -s /path/to/existing/docker /directory/in/PATH/com.docker.cli
+```
+
+> **Note**: The `PATH` environment variable is a colon separated list of
+> directories with priority from left to right. You can view it using
+> `echo $PATH`. You can find the path to the existing Docker CLI using
+> `which docker`. You may need root permissions to make this link.
+
+On a fresh install of Ubuntu 20.04 with Docker Engine
+[already installed](https://docs.docker.com/engine/install/ubuntu/):
+
+```console
+$ echo $PATH
+/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
+$ which docker
+/usr/bin/docker
+$ sudo ln -s /usr/bin/docker /usr/local/bin/com.docker.cli
+```
+
+You can verify that this is working by checking that the new CLI works with the
+default context:
+
+```console
+$ ./docker-aci --context default ps
+CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
+$ echo $?
+0
+```
+
+To make this CLI with ACI integration your default Docker CLI, you must move it
+to a directory in your `PATH` with higher priority than the existing Docker CLI.
+
+Again on a fresh Ubuntu 20.04:
+
+```console
+$ which docker
+/usr/bin/docker
+$ echo $PATH
+/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
+$ sudo mv docker-aci /usr/local/bin/docker
+$ which docker
+/usr/local/bin/docker
+$ docker version
+...
+ Azure integration  0.1.0
+...
+```
+
+## Uninstall
+
+To remove this CLI, you need to remove the binary you downloaded and
+`com.docker.cli` from your `PATH`. If you installed using the script, this can
+be done as follows:
+
+```console
+sudo rm /usr/local/bin/docker /usr/local/bin/com.docker.cli
+```