Walk me through a basic Dockerfile for a FastAPI app
WHAT IT TESTS: Docker layering and build cache for Python containers. ANSWER OUTLINE: Slim base, install deps before app code to cache layers, expose port, exec-form CMD for Uvicorn. RED FLAG: Shell-form CMD or code-before-requirements, killing cache.
WHAT IT TESTS: Your understanding of Docker layering, cache invalidation, and build-time versus run-time separation for Python ASGI services. ANSWER OUTLINE: Start with an official slim Python base; copy requirements first and pip install to cache dependency layers; copy source after so edits do not trigger reinstalls; expose port; and use exec-form CMD to launch Uvicorn directly so PID 1 handles signals.
Read the original → fastapi.tiangolo.com
- #docker
- #fastapi
- #python
- #containers
- #devops
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