Deployment

[bug-breeder]

🚀 Production Infrastructure Optimization & Mobile Authentication Fix

📋 Overview

This PR implements critical production infrastructure optimizations and resolves a major mobile authentication issue that was preventing users from logging in on mobile devices. The changes focus on cost efficiency, performance optimization, and cross-platform compatibility.

🔧 Key Fixes & Improvements

🔐 Mobile Authentication Resolution

• Fixed username collision issue where different Google accounts with same display names ("Anh Nguyen") caused database constraint violations
• Solution: Use full email address as username instead of display names to guarantee uniqueness
• Impact: Mobile and PC authentication now work independently without conflicts

💰 Cost Optimization

• Cloud Run Scaling Strategy:

  • Production: minScale: 1 (keeps warm for better UX, minimal cost)
  • Staging: minScale: 0 (scales to zero for maximum savings)

• Database Connection Pool Optimization:

  • Reduced MaxConnections: 25 → 10 (60% reduction)
  • Reduced MaxIdleConns: 5 → 1 (80% reduction)
  • Benefit: Allows NeonDB to go idle faster, reducing compute costs

🏗️ Infrastructure Enhancements

• Enhanced Metrics & Monitoring: Comprehensive Prometheus metrics for startup, database, and server performance
• Cross-Domain Authentication: Fixed cookie configuration for staging/production environments
• Environment Separation: Proper dev/staging/production configurations with environment-specific settings

⚡ Performance Improvements

• Client-Side TOTP Generation: Eliminates server polling, reduces database load
• Optimized Connection Management: Faster database idle detection and connection lifecycle
• Smart Environment Detection: Automatic cookie and CORS configuration based on environment

🌍 Multi-Environment Setup

Production (2fair.app)

• ✅ Domain: https://2fair.app
• ✅ API: https://api.2fair.app
• ✅ Keeps 1 instance warm for instant response
• ✅ Optimized for user experience

Staging (staging.2fair.app)

• ✅ Domain: https://staging.2fair.app
• ✅ API: https://api-staging.2fair.app
• ✅ Scales to zero for cost savings
• ✅ Production-like testing environment

Development

• ✅ Local development with proper environment isolation
• ✅ Mock configurations for testing

🔒 Security Enhancements

• Environment-Specific Cookie Configuration: Proper SameSite, Secure, and domain settings
• Cross-Domain CORS: Supports both custom domains and Firebase hosting URLs
• WebAuthn Support: Multi-origin authentication for different deployment targets

📈 Expected Impact

Cost Savings

• ~60-80% reduction in database connection overhead
• Staging environment scales to zero when unused
• NeonDB optimized for idle state detection

User Experience

• Fixed mobile authentication - both mobile and PC work independently
• Production stays warm for instant response
• Improved reliability with comprehensive monitoring

Development Efficiency

• Automated deployment scripts for all environments
• Comprehensive documentation for setup and troubleshooting
• Environment-specific configurations prevent misconfigurations

🧪 Testing

• ✅ Mobile authentication tested on both Google accounts
• ✅ Cross-domain cookie functionality verified
• ✅ Database connection pool optimization validated
• ✅ Cost optimization metrics confirmed
• ✅ All environments deployed and functional

📚 Documentation

• Added comprehensive deployment guides
• DNS setup instructions for custom domains
• Troubleshooting documentation
• Environment configuration templates

🎯 Next Steps

This PR completes the production infrastructure foundation. Phase 4 will focus on:

• Multi-device synchronization
• Advanced backup & recovery
• Enhanced security features
• Performance optimization
• Advanced user features

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Breaking Changes: None - fully backward compatible

Deployment: Requires redeployment to both staging and production environments to apply cost optimizations.