Development Environment Configuration Guide

Complete setup guide for local development environments, port management, and server configuration

Setting up a proper development environment is crucial for efficient web development. This comprehensive guide covers port configurations, server setups, database connections, and framework-specific configurations to help you build a robust local development environment.

🎨 Frontend Development Ports

Common ports and configurations for frontend development frameworks and tools.

Port 3000

React Development Server

Default port for React applications created with Create React App

React, Next.js, Create React App

View Port 3000 Guide →

Port 5173

Vite Development Server

Default port for Vite-based applications

Vue.js, React, Svelte, Vite

View Port 5173 Guide →

Port 4200

Angular Development Server

Default port for Angular CLI development server

Angular, Angular CLI

View Port 4200 Guide →

Port 3001

Alternative React Port

Common alternative when port 3000 is occupied

React, Next.js, Development

View Port 3001 Guide →

Port 4201

Alternative Angular Port

Alternative port for Angular applications

Angular, Development

View Port 4201 Guide →

⚙️ Backend Development Ports

Server ports for backend frameworks and API development.

Port 8080

Spring Boot Default

Default port for Spring Boot applications

Spring Boot, Java, Microservices

View Port 8080 Guide →

Port 8000

Python Development

Common port for Python web applications

Django, Flask, FastAPI

View Port 8000 Guide →

Port 5000

Flask & Node.js

Default port for Flask and some Node.js applications

Flask, Express.js, Development

View Port 5000 Guide →

Port 9000

Alternative Backend Port

Alternative port for backend services

Development, Testing, Microservices

View Port 9000 Guide →

Port 8081

Alternative Spring Boot

Alternative port for Spring Boot applications

Spring Boot, Java, Development

View Port 8081 Guide →

Port 5001

Alternative Python Port

Alternative port for Python applications

Django, Flask, Development

View Port 5001 Guide →

🗄️ Database Ports

Essential database ports for local development and testing.

Port 3306

MySQL Database

Default port for MySQL database server

MySQL, MariaDB, Database

View Port 3306 Guide →

Port 5432

PostgreSQL Database

Default port for PostgreSQL database server

PostgreSQL, Database

View Port 5432 Guide →

Port 27017

MongoDB Database

Default port for MongoDB database server

MongoDB, NoSQL, Database

View Port 27017 Guide →

Port 1433

SQL Server Database

Default port for Microsoft SQL Server

SQL Server, Database

View Port 1433 Guide →

Port 1521

Oracle Database

Default port for Oracle Database

Oracle, Database

View Port 1521 Guide →

Port 6379

Redis Cache

Default port for Redis in-memory database

Redis, Cache, Session Store

View Port 6379 Guide →

Port 11211

Memcached

Default port for Memcached caching system

Memcached, Cache, Performance

View Port 11211 Guide →

📚 Framework-Specific Guides

Comprehensive guides for popular development frameworks and technologies.

React Development Guide

Complete guide to React development, including hooks, state management, performance optimization, and best practices.

React Hooks and State Management
Performance Optimization Techniques
Testing React Applications
Common Development Issues

View React Development Guide →

Spring Boot Development Guide

Essential patterns, troubleshooting, and best practices for Spring Boot applications.

Spring Boot Architecture Patterns
Database Integration & JPA
Security & Authentication
Testing & Performance Optimization

View Spring Boot Development Guide →

🔧 Common Development Issues

Solutions for frequently encountered development environment problems.

Port Already in Use

Learn how to identify and resolve port conflicts in your development environment.

Identify which process is using a port
Kill processes safely
Configure alternative ports
Prevent future conflicts

View Port Already in Use Guide →

Connection Refused Errors

Comprehensive troubleshooting for connection refused errors in development.

Network configuration issues
Firewall and security settings
Service startup problems
DNS resolution issues

View Connection Refused Guide →

CORS Errors

Fix cross-origin resource sharing issues in development environments.

Understanding CORS policies
Server-side CORS configuration
Development environment solutions
Production deployment considerations

View CORS Errors Guide →

Localhost Not Working

Complete troubleshooting guide for localhost connection problems.

Server startup verification
DNS and hosts file issues
Firewall and security software
Browser and cache problems

View Localhost Troubleshooting Guide →

💡 Development Environment Best Practices

🎯 Port Management:

Use consistent port ranges for different types of services
Document your port assignments in project README files
Use environment variables for port configuration
Implement port availability checks in startup scripts

🔒 Security Considerations:

Never expose development databases to the internet
Use strong passwords even in local development
Keep development dependencies updated
Use separate databases for development and testing

⚡ Performance Optimization:

Use connection pooling for database connections
Implement caching strategies early in development
Monitor resource usage during development
Use development tools for performance profiling

External Resources

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