How can I use Docker with GitHub Actions?

How can I use Docker with GitHub Actions?

You can use Docker in GitHub Actions by defining a workflow that builds and pushes your Docker images. Would you like a sample workflow?

Yes, please provide a sample workflow for building a Docker image.

Here's a simple example:

name: Build Docker Image

on:
  push:
    branches:
      - main

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

This workflow builds and pushes a Docker image whenever you push to the main branch.

What if I want to run tests inside the Docker container?

You can add a step to run your tests after building the image. For example:

      - name: Run tests
        run: |
          docker run my-image:latest npm test

This will execute your tests inside the Docker container.

Can I use secrets in my Docker build?

Yes, you can use GitHub Secrets in your Docker build. You can pass them as build arguments or environment variables. Would you like to see how?