quix init could generate more developer-friendly dockerfiles.

[krisajenkins]

The dockerfile that quix init puts into each app directory is short, and that's good. But it also does a complete re-install of all the python dependencies on every rebuild, and that's bad.

A dockerfile like this separates out the pip install -r requirements.txt stage so that it can be cached. That makes rebuilds vastly faster:

# Dependency-building stage.
FROM python:3.11.1-slim-buster AS build

ENV DEBIAN_FRONTEND="noninteractive"
ENV PYTHONUNBUFFERED=1
ENV PYTHONIOENCODING=UTF-8

WORKDIR /app
RUN python3 -m venv env
ENV PATH="env/bin:$PATH"

COPY requirements.txt .
RUN python3 -m pip install -r requirements.txt

# Runtime stage.
FROM python:3.11.1-slim-buster AS runtime

WORKDIR /app
COPY --from=build /app/env /app/env
ENV PATH="env/bin:$PATH"

COPY . .

ENTRYPOINT ["env/bin/python3", "main.py"]

The cost is a longer dockerfile, but since it's autogenerated anyway, that's not too big a price to pay for faster redeployments.

[krisajenkins]

See also: quixio/template-hello-quix#14