FROM python:3.10 as requirements-stage WORKDIR /tmp RUN pip install poetry COPY ./pyproject.toml ./poetry.lock* /tmp/ RUN poetry export -f requirements.txt --output requirements.txt --without-hashes FROM python:3.10 WORKDIR /code COPY --from=requirements-stage /tmp/requirements.txt /code/requirements.txt RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt COPY . /code/ # Heroku uses PORT, Azure App Services uses WEBSITES_PORT, Fly.io uses 8080 by default CMD ["sh", "-c", "uvicorn server.main:app --host 0.0.0.0 --port ${PORT:-${WEBSITES_PORT:-8080}}"]