Hello, I'm trying to build a docker image for my fastapi application. I'm getting the exec /backend/.venv/bin/uvicorn: no such file or directory error while running the image. I have tried multiple times debugging the docker image. From that I could see the uvicorn exists in the /backend/.venv/bin directory. But when running it throws the above error. I have built multiple images, still no go. I know I'm missing something, I could not figure it out. Please help to solve this issue. Below is the dockerfile.

FROM ghcr.io/astral-sh/uv:python3.12-bookworm AS base

WORKDIR /backend

# Copy configuration files

COPY pyproject.toml uv.lock ./

# UV_COMPILE_BYTECODE for generating .pyc files -> faster application startup.

# UV_LINK_MODE=copy to silence warnings about not being able to use hard links

# since the cache and sync target are on separate file systems.

ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy

# Install dependencies

RUN --mount=type=cache,target=/root/.cache/uv \

--mount=type=bind,source=uv.lock,target=/backend/uv.lock \

--mount=type=bind,source=pyproject.toml,target=/backend/pyproject.toml \

uv sync --frozen --no-dev

# Copy source code

COPY app /backend/app

FROM python:3.12.8-slim AS final

EXPOSE 8000

# PYTHONUNBUFFERED=1 to disable output buffering

ENV PYTHONUNBUFFERED=1

ARG VERSION=0.1.0

ENV APP_VERSION=$VERSION

WORKDIR /backend

# Copy the virtual environment from the base stage

COPY --from=base /backend /backend

# Add virtual environment to PATH

ENV PATH="/backend/venv/bin:$PATH"

RUN baml-cli generate --from /backend/app/

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

hi! This seems to be a docker related issue. what i would recommend here is write a very very minimal server with uvicorn (no dependencies at all), and see if you can get it to run. My hunch says:

RUN --mount=type=cache,target=/root/.cache/uv \

--mount=type=bind,source=uv.lock,target=/backend/uv.lock \

--mount=type=bind,source=pyproject.toml,target=/backend/pyproject.toml \

this line is likely not doing what you think it is