Initial commit: STL Storage Application

- Complete web-based STL file storage and 3D viewer
- Express.js backend with SQLite database
- Interactive Three.js 3D viewer with orbit controls
- File upload with drag-and-drop support
- Security features: rate limiting, input validation, helmet
- Container deployment with Docker/Podman
- Production-ready configuration management
- Comprehensive logging and monitoring

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.env.example

@@ -0,0 +1,27 @@
+# STL Storage Application Configuration
+
+# Server Configuration
+PORT=3000
+NODE_ENV=production
+HOST=0.0.0.0
+
+# Database Configuration
+DB_PATH=./stl_storage.db
+UPLOAD_DIR=./uploads
+
+# File Upload Limits
+MAX_FILE_SIZE=104857600
+MAX_FILES_PER_REQUEST=5
+ALLOWED_EXTENSIONS=.stl,.STL
+
+# Rate Limiting
+RATE_LIMIT_WINDOW_MS=900000
+RATE_LIMIT_MAX_REQUESTS=100
+
+# Security
+SESSION_SECRET=your-secret-key-change-this
+BCRYPT_ROUNDS=12
+
+# Logging
+LOG_LEVEL=info
+LOG_FILE=./logs/app.log