Useful-mcps

# Implement Docker Server Management Functions > Adds robust Docker server management to the PlantUML renderer ## Objectives - Implement `start_docker_server()` to launch PlantUML Docker container - Implement `is_server_running()` to check container status - Add error handling for Docker command failures - Ensure idempotent server startup (no duplicate containers) - Provide clear error messages for common issues ## Contexts - plantuml_renderer.py: Core rendering logic - pyproject.toml: Dependency management file ## Low-level Tasks 1. UPDATE plantuml_renderer.py: - Implement `start_docker_server()`: - Uses `subprocess.run` for Docker commands - Uses `plantuml/docker` image from Docker Hub - Maps port 8080 with `-p 8080:8080` - Handles `ContainerAlreadyRunning` scenario - Implement `is_server_running()`: - Parses `docker ps` output for container status - Returns boolean - Update `render_diagram()`: - Pre-check server status before rendering - Auto-start server if not running - Add exception handling blocks for: - Docker command failures (`subprocess.CalledProcessError`) - Port conflicts - Server startup timeouts 2. UPDATE pyproject.toml: - Add `click` dependency if missing (for future CLI enhancements) - Add comment about requiring Docker CLI in tool.poetry section 3. ADD healthcheck functionality: - Create `check_docker_install()` to verify Docker is installed - Create `wait_for_server()` with timeout logic