Clean up unused files, backend packages, etc.

[js0mmer]

Description

• Removed some unused files/code
• Removed unused packages on backend
• Removed bin/www
• Cleaned up gitignore, tsconfig, express app.ts

Next steps:

• Update packages on backend
  • Notably, the MongoDB driver is 3 major versions behind and I am reluctant to upgrade it because I think our time would be better spent just switching to mongoose or Prisma. This could be a PR of it's own.
• Remove unused express routes
  • Everything that's not used or not helpful should be removed now.
  • There's some unused routes for requesting a single professor and single course that we honestly should use. I don't like how the same batch route is used for course/professor pages and the catalogue page, search times could probably be improved by selecting fewer attributes. I think it would also make more sense to call websoc fuzzy search on the backend and just send the query to the backend
• Add eslint to backend (Add eslint to the backend #400)
• Remove unneeded console logs
  • there are a few left behind on the frontend on course pages and the catalogue page. I've left them in for now because our search could use some work, these logs can be dealt with then
  • there are also still some left in the express server. it would be good if we could keep them in dev but drop them from the production build

I plan to address updating backend packages (with the exception of the mongo driver) alongside adding eslint in a separate PR since these will introduce breaking changes.

Steps to verify/test this change:

• Verify changes work as expected on staging instance

Final Checks:

• Verify successful deployment
• Delete branch

(optional)

• Write tests
• Write documentation

Issues

Closes #365

[github-actions]

Deployed staging instance to https://staging-396.peterportal.org