Snippets / Dockerfile
Python app
A Dockerfile for a Flask/FastAPI-style Python service.
pythonflaskfastapi
Dockerfile
FROM python:3.12-slim
WORKDIR /app
# requirements.txt copied alone so this layer -- the slow one -- is only
# invalidated when dependencies actually change.
COPY requirements.txt .
# --no-cache-dir skips pip's download cache, which would otherwise sit
# in this layer doing nothing for you on a one-shot container build.
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
# python:*-slim has no non-root user by default, unlike the node images.
RUN useradd -m appuser
USER appuser
EXPOSE 8000
CMD ["gunicorn", "--bind", "0.0.0.0:8000", "app:app"]
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