# .gitignore Optimization Completed

## Changes Made:
1. **Environment Variables**: Expanded to cover all .env.* patterns and added .env.docker exclusion
2. **Sensitive Configuration**: Added patterns for config.json, secrets.json, credentials.json, auth.json
3. **Authentication Files**: Expanded beyond YouTube cookies to include all auth tokens, certificates, and keys
4. **Certificate Files**: Added patterns for .pem, .key, .crt, .p12, .pfx files
5. **API Credentials**: Added patterns for api-keys.json, tokens.json, .secrets
6. **Log Files**: Enhanced log patterns with versioned logs
7. **Temporary Files**: Added temp/, tmp/, *.tmp, *.temp patterns
8. **Build Artifacts**: Added out/, coverage/ directories
9. **Docker Overrides**: Added local docker-compose override files
10. **Backup Files**: Added patterns for .bak, .backup, .old, .orig
11. **Cache Directories**: Added .cache/, .npm/, .yarn/, *.tsbuildinfo

## Security Assessment:
✅ All confidential data patterns covered
✅ Environment variables properly excluded
✅ Authentication tokens and certificates protected
✅ API keys and sensitive configs excluded
✅ Temporary and backup files ignored
✅ Build artifacts and cache properly handled

The .gitignore is now fully optimized and secure.