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multistage.Dockerfile
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multistage.Dockerfile
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# An example using multi-stage image builds to create a final image without uv.
# First, build the application in the `/app` directory.
# See `Dockerfile` for details.
FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS builder
ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
WORKDIR /app
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 python:3.12-slim-bookworm
# It is important to use the image that matches the builder, as the path to the
# Python executable must be the same, e.g., using `python:3.11-slim-bookworm`
# will fail.
# 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"
# Run the FastAPI application by default
CMD ["fastapi", "dev", "--host", "0.0.0.0", "/app/src/uv_docker_example"]