Consider unifying common parts of Makefiles in numpy.org and scientific-python.org projects

[alphapapa]

@jarrodmillman @stefanv

I noticed some similarities between the Makefiles of the numpy.org and scientific-python.org repos.

1. I wonder if would be helpful to unify them, at least the parts that are common to both.
2. If so, it might also be helpful to develop that common part in the scientific-python-hugo-theme repo, perhaps so it could be a) used from a submodule, or b) at least used as a template that downstream projects could copy and modify as needed.

Please let me know what you think. If you approve, I'll be glad to work on this. Thanks.

See also:

• Print Makefile help via Python; reorganize targets #526
• Makefile's serve rule checks out submodules, making testing theme changes difficult #679

[stefanv]

I imagine those are only a line or two, but if there's an easy way to refactor and you think that'd be helpful, go for it.

[alphapapa]

@stefanv Thanks. Would you assign this issue to me please?