How can I integrate Docker with my CI pipeline?

How can I integrate Docker with my CI pipeline?

Integrating Docker with your CI pipeline involves using Docker images to create consistent environments for your builds. You can start by defining a Dockerfile for your application.

What should I include in my Dockerfile?

Your Dockerfile should include the base image, application dependencies, and commands to build and run your application. For example, you might start with FROM node:14 for a Node.js app.

How do I set up the CI tool to use this Dockerfile?

In your CI configuration file, specify the Docker build command, such as docker build -t myapp ., and then run your tests in a container using docker run myapp.

Can you give me an example of a CI configuration file?

Sure! If you're using GitHub Actions, your .github/workflows/ci.yml might look like this:

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 myapp .
      - name: Run tests
        run: docker run myapp npm test