Dockerfile doesn't point to specific Python build, instead just says Python:3

[jonfroehlich]

Our Dockerfile doesn't properly specify a Python build to use, which is causing problems:

# All Dockerfiles must start with a 'FROM' instruction, which specifies a base image
# See: https://docs.docker.com/engine/reference/builder/#format
# Note, some online sources say that you should put FROM django here (e.g., https://runnable.com/docker/python/dockerize-your-django-application)
# but, in fact, you should NOT do this according to the official docs (as this approach has been deprecated). 
# See: https://hub.docker.com/_/django/
FROM python:3.7

# Setup some other prereqs needed:
# TODO: we may want to consider adding pip here as I'm getting warnings about old pip
#RUN pip install --upgrade pip 

# See: https://www.quora.com/How-does-one-install-pip-in-a-Docker-container-using-a-Dockerfile
RUN apt-get update && apt-get --assume-yes install imagemagick ghostscript sqlite3

To fix this, need to specify exactly what Python to use. See: Dockerizing Python is hard.

[jonfroehlich]

This doesn't seem to be fixing the problem. As Docker is still trying to use python3.10 even if I specify 3.7 in Dockerfile.

Maybe this Stack Overflow post can help?

https://stackoverflow.com/questions/59681129/setting-specific-python-version-in-docker-file-with-specfic-non-python-base-imag

[jonfroehlich]

I couldn't figure it out. Asked on Stack Overflow! :)

https://stackoverflow.com/questions/69540438/wrong-python-version-running-in-docker

[jonfroehlich]

I wiped the dev environment and tried again and it worked with a clearly specified Python version number in the Dockerfile.

Fixed here: 80818ec

But now we have this permissions issue described #956