Add comprehensive configuration and testing for HMAC File Server 3.2

- Introduced configuration files for Docker, Podman, and SystemD deployments.
- Implemented a comprehensive test suite for HMAC validation, file uploads, and network resilience.
- Added debugging scripts for live monitoring of upload issues and service status.
- Created minimal configuration for testing purposes.
- Developed multiple test scripts to validate HMAC calculations and response handling.
- Enhanced upload tests to cover various scenarios including invalid HMAC and unsupported file extensions.
- Improved logging and error analysis capabilities for better diagnostics.

tests/README.md

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+# HMAC File Server 3.2 Test Suite
+
+This directory contains comprehensive testing tools for the HMAC File Server 3.2 "Tremora del Terra".
+
+## 🚀 Quick Start
+
+Run the complete test suite:
+```bash
+./comprehensive_test_suite.sh
+```
+
+## 📋 Test Coverage
+
+The comprehensive test suite covers:
+
+### ✅ Core Functionality
+- **HMAC Validation**: Ensures proper authentication
+- **File Extensions**: Tests allowed/blocked file types
+- **Upload Mechanics**: Validates upload process
+- **Server Health**: Checks service availability
+
+### 🎥 XMPP Integration
+- **MP4 Upload**: Tests video file sharing for XMPP clients
+- **Image Upload**: Tests image sharing (PNG, JPEG)
+- **File Size Limits**: Validates large file handling
+
+### 🌐 Network Resilience (3.2 Features)
+- **Health Monitoring**: Tests network resilience endpoints
+- **Metrics Collection**: Validates monitoring capabilities
+- **Mobile Switching**: Supports seamless network transitions
+
+### 🚫 Security Testing
+- **Invalid HMAC**: Ensures rejected authentication fails
+- **Unsupported Extensions**: Confirms blocked file types
+- **Path Validation**: Tests file path sanitization
+
+## 🔧 Commands
+
+```bash
+# Run all tests
+./comprehensive_test_suite.sh
+
+# Setup test files only
+./comprehensive_test_suite.sh setup
+
+# Clean up test files
+./comprehensive_test_suite.sh clean
+
+# Show help
+./comprehensive_test_suite.sh help
+```
+
+## 📊 Test Results
+
+Tests generate detailed logs with:
+- ✅ **Pass/Fail status** for each test
+- 🕒 **Timestamps** for performance tracking
+- 📝 **Detailed output** saved to `/tmp/hmac_test_results_*.log`
+- 📈 **Summary statistics** (passed/failed counts)
+
+## 🎯 Expected Results
+
+When all systems are working correctly:
+- **✅ PASS**: HMAC validation
+- **✅ PASS**: MP4 upload (XMPP)
+- **✅ PASS**: Image upload  
+- **✅ PASS**: Large file upload
+- **✅ PASS**: Server health check
+- **❌ FAIL**: Invalid HMAC (should fail)
+- **❌ FAIL**: Unsupported extension (should fail)
+
+## 🔍 Troubleshooting
+
+### Common Issues
+1. **Connection refused**: Check if server is running
+2. **403 Forbidden**: Verify HMAC key configuration
+3. **400 Bad Request**: Check file extension configuration
+4. **Timeout**: Large files may need adjusted timeouts
+
+### Debug Mode
+For detailed debugging, check server logs:
+```bash
+sudo journalctl -u hmac-file-server -f
+```
+
+## 📁 File Cleanup
+
+The test suite automatically cleans up temporary files, but if needed:
+```bash
+rm -f /tmp/test_*.{txt,mp4,bin,png,xyz}
+rm -f /tmp/hmac_test_results_*.log
+```
+
+## 🔧 Configuration
+
+Tests use these defaults (modify in script if needed):
+- **Base URL**: `https://xmpp.uuxo.net`
+- **Test User**: `c184288b79f8b7a6f7d87ac7f1fb1ce6dcf49a80`
+- **HMAC Key**: Configured in script
+
+## 📝 Legacy Test Files
+
+This comprehensive suite replaces these scattered root-level test files:
+- `test-hmac-fixed.sh` → Integrated into comprehensive suite
+- `test-upload.sh` → Covered by upload tests
+- `debug-uploads.sh` → Debug logging integrated
+- `comprehensive_upload_test.sh` → Replaced by this suite
+- Various monitor scripts → Health checks integrated
+
+## 🎉 3.2 "Tremora del Terra" Features Tested
+
+- ✅ **Enhanced Network Resilience**: 1-second detection
+- ✅ **Mobile Network Switching**: WLAN ↔ IPv6 5G seamless transitions
+- ✅ **XMPP File Sharing**: Conversations/Gajim compatibility
+- ✅ **Configuration Validation**: Proper extension loading
+- ✅ **Production Deployment**: SystemD, Docker, Podman support