How can I use Docker in GitHub Actions?

How can I use Docker in GitHub Actions?

You can use Docker in GitHub Actions by defining a job that runs a Docker container. Would you like a sample workflow?

Yes, please provide a sample workflow.

Here's a simple example:

name: CI

on: [push]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v2
    - name: Build Docker image
      run: |
        docker build -t my-image .
    - name: Run tests
      run: |
        docker run my-image test

This workflow builds a Docker image and runs tests in it.

What if I need to push the Docker image to Docker Hub?

You can add a step to log in to Docker Hub and then push the image. Here's how:

    - name: Log in to Docker Hub
      run: |
        echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
    - name: Push Docker image
      run: |
        docker push my-image

Make sure to store your Docker Hub credentials in GitHub Secrets.