Dockerfile

# An example of using standalone Python builds with multistage images.

# First, build the application in the `/app` directory
FROM ghcr.io/astral-sh/uv:bookworm-slim AS builder
WORKDIR /app

ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy

# Configure the Python directory so it is consistent
ENV UV_PYTHON_INSTALL_DIR=/python

# Only use the managed Python version
ENV UV_PYTHON_PREFERENCE=only-managed

# Install Python before the project for caching
ADD .python-version /app/.python-version
RUN uv python install "$(cat .python-version)"

RUN --mount=type=cache,target=/root/.cache/uv \
    --mount=type=bind,source=uv.lock,target=uv.lock \
    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
    uv sync --frozen --no-install-project --no-dev
ADD . /app
RUN --mount=type=cache,target=/root/.cache/uv \
    uv sync --frozen --no-dev

# Then, use a final image without uv
FROM gcr.io/distroless/base-debian12 AS runtime

# Copy the Python version
COPY --from=builder --chown=python:python /python /python

# Copy the application from the builder
COPY --from=builder --chown=app:app /app /app

# Place executables in the environment at the front of the path
ENV PATH="/app/.venv/bin:$PATH"

# For logs in docker
ENV PYTHONUNBUFFERED=1

# Run the application
CMD ["/app/.venv/bin/main"]