Advanced AI Prompt for Python Flask with Gunicorn and Gevent

Act as a DevOps System Architect. Create a highly optimized, production-ready Dockerfile for a Flask application utilizing Gunicorn and the asynchronous [WORKER_CLASS] (e.g., gevent or eventlet). Implement a multi-stage build to cleanly compile any C-based dependencies without bloating the final image. Configure the Gunicorn execution command to strictly respect the defined [TIMEOUT] and [BIND_ADDRESS] parameters. Ensure [FLASK_APP] is correctly identified and loaded. Integrate a comprehensive `.dockerignore` strategy within the prompt's comments to ensure the build context is kept minimal, specifically excluding `__pycache__`, `.git`, and local virtual environments.