Make Vocabustudy Ready for the World 🌎

[IMGROOT2]

This is a checklist of things we should review before launching our Product Hunt and advertising to Westwood/the rest of the world.

If there's more, I'll add it here. The due date is hopefully by spring, but the hard deadline is back to school.

### Tasks
- [ ] Implement bad words filter
- [ ] Accessibility, Page Speed, QOL (see [PageSpeed Insights.](https://pagespeed.web.dev/report?url=https%3A%2F%2Fvocabustudy.org%2F) ) We should probably run this on the blog, For Zero's Website, etc.
- [x] Remove all trace of "This is a website for students at CVMS"

[grimsteel]

If someone could run Lighthouse and PageSpeed Insights after #271 is merged that would be great