Production Frontend Monorepo Boilerplate screenshot 1

Production Frontend Monorepo Boilerplate

About

Frontend Lifecycle is a modern React monorepo demonstrating how a frontend application moves from development to production using a scalable project structure, shared packages, automated quality checks, CI/CD pipelines, semantic versioning, and AWS deployment.

The purpose of this project is to demonstrate a production-ready frontend workflow rather than just a standalone React application.

Overview

This project explores the complete lifecycle of a frontend application:

Development │ ▼ Monorepo Architecture │ ▼ Shared Packages │ ▼ Type Checking │ ▼ Linting │ ▼ Unit Testing │ ▼ GitHub Actions │ ▼ SonarCloud Analysis │ ▼ Semantic Release │ ▼ AWS S3 Deployment │ ▼ CloudFront CDN

Project Structure

. ├── apps/ │ └── enduser-portal │ ├── packages/ │ ├── ui │ ├── eslint-config │ ├── jest-config │ └── typescript-config │ ├── .github/ │ └── workflows/ │ ├── pnpm-workspace.yaml ├── lerna.json ├── sonar-project.properties └── package.json

Technologies Used

Frontend

  • React
  • TypeScript
  • Vite

Monorepo

  • pnpm Workspaces
  • Lerna

Code Quality

  • ESLint
  • TypeScript
  • SonarCloud

Testing

  • Jest
  • React Testing Library

CI/CD

  • GitHub Actions
  • Semantic Release

Deployment

  • AWS S3
  • AWS CloudFront
  • Origin Access Control (OAC)

Monorepo Architecture

The repository is organized using pnpm workspaces and Lerna.

Instead of placing everything inside a single React application, common functionality is extracted into reusable packages.

Examples include:

  • Shared UI components
  • Shared ESLint configuration
  • Shared Jest configuration
  • Shared TypeScript configuration

This approach keeps multiple applications consistent while avoiding duplicated configuration.

Shared Packages

The packages/ directory contains reusable modules shared across applications.

UI

Contains reusable React components that can be shared across applications.

ESLint Configuration

Provides shared linting rules so applications follow consistent coding standards.

Jest Configuration

Provides shared testing configuration.

TypeScript Configuration

Provides reusable TypeScript configuration that applications can extend instead of maintaining independent configurations.

Type Safety

A base TypeScript configuration is shared across the repository.

Each application extends the base configuration instead of maintaining its own independent setup.

Benefits include:

  • Consistent compiler settings
  • Reusable configuration
  • Easier maintenance

Code Quality

ESLint is configured once and shared across all workspaces.

This ensures every project follows the same coding standards.

Testing

Unit testing is configured using:

  • Jest
  • React Testing Library

The repository includes sample tests and coverage generation to validate application behavior during CI.

Continuous Integration

GitHub Actions automatically validates every Pull Request.

Quality gates include:

  • TypeScript compilation
  • ESLint
  • Unit Tests
  • Production Build
  • SonarCloud Analysis

The workflow ensures that code passes the required quality checks before it can be merged.

SonarCloud

Static code analysis is integrated using SonarCloud.

The analysis provides:

  • Code smells
  • Bugs
  • Security hotspots
  • Maintainability metrics
  • Quality Gate validation

Semantic Release

Releases are automated using Semantic Release.

The workflow:

  • Analyzes commit messages
  • Determines the next version
  • Generates release notes
  • Publishes GitHub releases automatically

Deployment

Production builds are deployed automatically.

The deployment flow is:

GitHub │ ▼ GitHub Actions │ ▼ Production Build │ ▼ AWS S3 │ ▼ CloudFront │ ▼ End Users

The application is hosted using:

  • Amazon S3
  • CloudFront CDN
  • Origin Access Control (OAC)

The S3 bucket remains private while CloudFront securely serves the application.

CI/CD Workflows

The repository contains multiple GitHub Actions workflows.

Pull Request

Runs quality checks for incoming pull requests.

Quality Gates

Executes:

  • TypeScript
  • ESLint
  • Unit Tests
  • Build
  • SonarCloud

Release

Handles:

  • Semantic Versioning
  • GitHub Releases

Deploy

Deploys the production build to AWS.

Key Learnings

Working on this repository helped me understand:

  • Monorepo architecture
  • Workspace management
  • Shared package design
  • Reusable configurations
  • GitHub Actions
  • CI/CD pipelines
  • Branch protection workflows
  • Automated testing
  • Static code analysis
  • Semantic Versioning
  • Production deployment
  • AWS S3
  • CloudFront
  • Origin Access Control (OAC)

Future Improvements

  • Add additional applications to the monorepo
  • Expand shared UI components
  • Increase unit test coverage
  • Add end-to-end testing
  • Automate infrastructure provisioning
  • Add monitoring and performance reporting

Built by Rahul S