Hands-on – your first action

The power of GitHub Actions lies in its reusability, so understanding how to create and use Actions is important. In this hands-on exercise, you will create a container action that runs inside a Docker container.

Tip

You can find this example at https://docs.github.com/en/actions/creating-actions/creating-a-docker-container-action and you can copy and paste the content of the text files from there. If you want, you can also use the template repository at https://github.com/actions/container-action and click Use this template. It will create a repository with all files in it for you.

The steps are as follows:

1. Create a new repository called hello-world-docker-action and clone it to your workstation.
2. Open a Terminal and navigate to the repository:

   $ cd hello-world-docker-action

3. Create a file called Dockerfile without an extension. Add the following content to it:

   # Container image that runs your code
   FROM alpine:3.10
   # Copies...