Dockerfile for FastAPI using PDM package manager

Dockerfile

# Builder container uses pdm to install dependencies
FROM python:3.10 AS builder

ENV PDM_VERSION=1.13.4

WORKDIR /build
COPY pdm.lock pyproject.toml ./
RUN python -m pip install --upgrade pip setuptools wheel
RUN pip install pdm && pdm install --prod --no-lock --no-editable

# Fresh container that does not have the build tool pdm
# Also using the slim image to save image size
FROM python:3.10-slim

WORKDIR /code
COPY app app

# Copy installed dependencies and binaries from the build container,
# and append to PYTHONPATH and PATH respectively
COPY --from=builder /build/__pypackages__/3.10/lib lib
COPY --from=builder /build/__pypackages__/3.10/bin bin
COPY --from=builder /build/cacertificate.pem cacertificate.pem
ENV PYTHONPATH "/code/lib"
ENV PATH "/code/bin:{$PATH}"

CMD [ "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80" ]