How can I use Docker for Continuous Integration?

How can I use Docker for Continuous Integration?

You can use Docker to create consistent environments for your CI pipelines. This helps ensure that your application runs the same way in development and production.

What are the benefits of using Docker in CI?

Some benefits include faster builds, environment consistency, and easier dependency management. It also simplifies scaling and deployment.

Can you give me a basic example of a Dockerfile for a CI pipeline?

Sure! A simple Dockerfile might look like this:

FROM node:14
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
CMD ["npm", "test"]

This sets up a Node.js environment for running tests.

How do I integrate this Docker setup with GitHub Actions?

You can create a GitHub Actions workflow file that builds your Docker image and runs it. Here's a basic 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 .
      - name: Run tests
        run: docker run your-image-name