[WIP] Review repository for potential improvements

[Copilot]

Repository Review and Improvement Plan

Based on my comprehensive review, here are the improvements needed:

Security Issues

• Fix hardcoded credentials in docker-compose.yml
• Add environment variable configuration with .env.example
• Add security headers to FastAPI gateway
• Update vulnerable dependencies

Documentation Issues

• Fix broken documentation links in README.md
• Add missing API_REFERENCE.md, OPERATIONS.md, THREAT_MODELS.md
• Add setup instructions and prerequisites detail
• Add troubleshooting guide

Code Quality Issues

• Fix Dockerfile COPY paths (using .. incorrectly)
• Add missing source files for frontend (React components)
• Add missing source files for JS modules (index.js)
• Add missing source files for Java modules (Spring Boot application)
• Add proper error handling to Python modules
• Add input validation and sanitization

CI/CD Issues

• Fix GitHub Actions workflow to test all modules
• Add Docker build tests
• Add integration tests

Configuration Issues

• Add .env.example for environment variables
• Add proper health checks for all services
• Fix requirements.txt duplication

Missing Features

• Add basic frontend UI structure
• Add basic module implementations
• Add sample detection rules
• Add test suite structure

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