Reinstall Flask-PyMongo

Reinstall pymongo and update requirements

Add pymongo to requirements

Update requirements.txt

Update requirements

Add runtime file with python version

Set debug to false

update Google font link in css

Fix typo in README

Update TESTING.md with username issue in dropdown menu

Fix typos in README

Update link on 404 page and tidy up code

Fix hero text padding on smaller devices

Make minor styling changes

Fix typos and update TESTING.md file