🔄 What is a CI/CD Pipeline?

CI/CD stands for:

• CI = Continuous Integration
• CD = Continuous Delivery / Continuous Deployment

A CI/CD pipeline is an automated process that helps build, test, and deploy your code quickly, reliably, and consistently across environments (like dev, staging, production).

✅ 1. Continuous Integration (CI)

CI means:

• Developers frequently push code to a shared repository (like GitHub, GitLab).
• Every push triggers automated builds and tests.
• This helps catch bugs early and ensures code stays stable.

Example:

git push origin main
# Trigger: Build → Unit Test → Lint → Package

✅ 2. Continuous Delivery (CD)

CD means:

• After passing tests in CI, code is automatically packaged and ready to deploy to staging or production.
• Deployment may still require manual approval.

✅ 3. Continuous Deployment

A step beyond Continuous Delivery:

• Code is automatically deployed to production without manual approval if all tests pass.
• Used when teams have high confidence in test coverage.

📦 Typical CI/CD Pipeline Stages

🛠️ Tools for CI/CD

🧠 Why Use CI/CD?

• ✅ Faster delivery of features and fixes
• ✅ Early bug detection
• ✅ Consistency and repeatability
• ✅ Less manual work = fewer errors
• ✅ Easy rollback and monitoring

📌 Example (Angular + .NET Core with GitHub Actions):

name: Build and Deploy

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Setup Node.js
      uses: actions/setup-node@v2
      with:
        node-version: '16'
    - name: Install Angular
      run: npm install -g @angular/cli
    - name: Install Dependencies
      run: npm install
    - name: Build Angular
      run: ng build --prod

    - name: Setup .NET
      uses: actions/setup-dotnet@v2
      with:
        dotnet-version: '7.0.x'
    - name: Build .NET API
      run: dotnet build
    - name: Run Tests
      run: dotnet test

    # Add deployment step if needed

Happy Coding!