CI/CD pipeline for Express apps

Introduction

A CI/CD pipeline helps you automatically test and deliver your Express app updates quickly and safely.

When you want to automatically test your Express app after every code change.

When you want to deploy your Express app to a server without manual steps.

When you want to catch errors early before your app goes live.

When you want to speed up your development by automating builds and deployments.

When you want to keep your app updated on production with minimal effort.

Syntax

Express

name: Express CI/CD Pipeline
on: [push]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Use Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
      - run: npm install
      - run: npm test
      - run: npm run build
      - name: Deploy
        run: |
          echo "Deploy commands here"

This example uses GitHub Actions syntax for a CI/CD pipeline.

Replace npm run build and deploy commands with your app's specific commands.

Examples

This simple pipeline installs dependencies and runs tests on every push.

Express

on: [push]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: npm install
      - run: npm test

This pipeline runs only on the main branch and deploys built files to a server.

Express

on:
  push:
    branches:
      - main
jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: npm install
      - run: npm run build
      - run: scp -r ./dist user@server:/var/www/app

Sample Program

This pipeline runs on pushes to the main branch. It installs dependencies, runs tests, builds the app, then copies files to a server and restarts the app process.

Express

name: Express CI/CD Pipeline
on:
  push:
    branches:
      - main
jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
      - name: Install dependencies
        run: npm install
      - name: Run tests
        run: npm test
      - name: Build app
        run: npm run build
      - name: Deploy to server
        run: |
          scp -r ./dist [e-mail]:/var/www/express-app
          ssh [e-mail] 'pm2 restart express-app'

Important Notes

Make sure your server allows SSH access and you have keys set up for deployment.

Use environment variables to keep secrets like server user and IP safe.

Test your pipeline with a small change before relying on it fully.

Summary

A CI/CD pipeline automates testing and deployment for your Express app.

It saves time and reduces errors by running steps automatically on code changes.

Use tools like GitHub Actions to create simple pipelines with steps for install, test, build, and deploy.