Users/will/mypy fixes

[TheWill10m]

Changes to stop MyPy errors

Describe your Changes

1. Fixed type hints
2. Changed imports
   • Imports are done using a package name
   • This changes how the flask app is run, in order to load the package
   • The IP and port number must now be specified in the CLI

Example use case

flask --app webapp.main:app run --host 0.0.0.0 --port 8000

Issue Ticket Number and Link

• CWS-21

Checklist before requesting a review

• [x] I have performed a self-review of my code