Dockerfile.multi-stage

# stage 1: build
ARG base_image=python:3.12-slim
FROM ${base_image} AS build

WORKDIR /home/greybook
RUN apt-get update && apt-get install -y gcc g++

# install dependencies
COPY requirements.txt requirements.txt
RUN python3 -m venv venv
RUN venv/bin/pip install -r requirements.txt
RUN venv/bin/pip install gunicorn

# stage 2: production
FROM ${base_image}

RUN groupadd -r greybook && useradd -r -g greybook greybook
WORKDIR /home/greybook

# copy the installed dependencies from the previous stage
COPY --from=build /home/greybook/venv/ venv/

# copy the application source code from the previous stage
COPY greybook greybook
COPY migrations migrations
COPY logs logs
COPY uploads uploads
COPY app.py .

ENV FLASK_APP app
ENV FLASK_CONFIG production

RUN chown -R greybook:greybook .
USER greybook

EXPOSE 5000
RUN venv/bin/flask db upgrade
ENTRYPOINT ["venv/bin/gunicorn", "-b", ":5000", "--access-logfile", "-", "--error-logfile", "-", "app:app"]