Simple Python Docker file with Gunicorn/Uvicorn

gistfile1.txt

FROM python:3.12-bookworm AS builder

RUN pip install poetry

ENV POETRY_NO_INTERACTION=1 \
    POETRY_VIRTUALENVS_IN_PROJECT=1 \
    POETRY_VIRTUALENVS_CREATE=1 \
    POETRY_CACHE_DIR=/tmp/poetry_cache

WORKDIR /app

COPY pyproject.toml poetry.lock ./
RUN touch README.md

RUN --mount=type=cache,target=$POETRY_CACHE_DIR poetry install --no-root

FROM python:3.12-slim AS runtime

ENV PORT=8000
ENV VIRTUAL_ENV=/app/.venv \
    PATH="/app/.venv/bin:$PATH"

COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}

COPY src ./app

WORKDIR /app

CMD exec gunicorn api:app --workers 1 --threads 8 --timeout 0 --worker-class uvicorn.workers.UvicornWorker --bind 0.0.0.0:$PORT