Add static analysis to build

[bctcvai]

A few catchable, but unobserved, coding issues have snuck by testing into production.

The build now does formatting checks for both javascript and python. flake8 could be used on the python side to catch more logic errors vs. just formatting related snaffos. eslint could be used on the javascript side for a similar purpose.

We can create sub-issues to this one as each of those insertions is independent. Ideally we add these tools, or similar, into the build such that errors are caught early. Both tools on our code base catch thousands of errors, many innocuous, so either just fixing them or creating ignore rules would be prudent.