I need to have access to both npm and pipenv in the same container. I'm thinking the best way to accomplish this is with a multistage build.
If I do something like this:
FROM python:3.7
COPY Pipfile /app/Pipfile
RUN pip install pipenv
FROM node:8
npm install
How do I make sure that the pipenv binary is not discarded? What files do I need to copy from the previous stage so that pipenv is available in the final image?