Development: reduce the number of files watched by `nodemon`

[humitos]

In theory, nodemon should watch only 779,

root@716db483de08:/usr/src/app/checkouts/readthedocs.org# find ./readthedocs -type f -name '*.py' | wc -l
779

but it says it's watching ~5k:

web_1       | [nodemon] watching 4989 files

Related #160

[benjaoming]

I think it's okay to close this. I haven't experienced issues with nodemon. Can't really guarantee if it's ONLY *.py that needs to be watched.. there's always the option of some other file being loaded only once. Template caching, too.