Align documentation and Docker configuration with current implementation

- Fix README.md: Make Docker deployment recommended, remove duplicate installation section
- Fix Dockerfile: Copy correct source files (unraid_mcp/, uv.lock, README.md) instead of non-existent unraid_mcp_server.py
- Update docker-compose.yml: Enable build configuration and use .env instead of .env.local
- Add missing environment variables to .env.example and .env: UNRAID_AUTO_START_SUBSCRIPTIONS, UNRAID_MAX_RECONNECT_ATTEMPTS
- Fix CLAUDE.md: Correct environment hierarchy documentation (../env.local → ../.env.local)
- Remove unused unraid-schema.json file

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

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

.env.example

@@ -24,8 +24,14 @@ UNRAID_MCP_LOG_FILE=unraid-mcp.log  # Log file name (saved to logs/ directory)
 # Set to a file path to use a custom CA bundle
 UNRAID_VERIFY_SSL=true
 
-# Optional: Subscription Auto-start Log Path
-# ------------------------------------------
-# Custom log file path for subscription auto-start diagnostics
+# Real-time Subscription Configuration
+# ------------------------------------
+# Enable automatic subscription startup (true/false)
+UNRAID_AUTO_START_SUBSCRIPTIONS=true
+
+# Maximum WebSocket reconnection attempts (numeric)
+UNRAID_MAX_RECONNECT_ATTEMPTS=10
+
+# Optional: Custom log file path for subscription auto-start diagnostics
 # Defaults to standard log if not specified
 # UNRAID_AUTOSTART_LOG_PATH=/custom/path/to/autostart.log