Docker image

[modem7]

As #53 hasn't been updated for two years, I've built my own version with a couple of improvements and added documentation.

https://github.com/modem7/docker-dumb-pypi

https://hub.docker.com/r/modem7/dumb-pypi

This is currently being used in production to great effect under https://github.com/modem7/PyPI (build_pypi_wheels.sh and build_borg_wheels.sh)

If this is useful, it may be beneficial to add it to the documentation, and if it isn't, please feel free to close this issue.

Thanks!

[Anthony Sottile]

I don't really think an image that just runs pip install dumb-pypi is all that useful -- anyone can replicate that in the flavor they care about