Fill front page

**Is your feature request related to a problem? Please describe.**
The front page is currently one screen displaying a fancy network graphic and a "Join Now" button linking to the newsletter form.

**Describe the solution you'd like**
The front page should be updated to include information such as the calendar, possibly upcoming events, or anything really to make it more than a fancy screen.

**Additional context**
Work for this should be completed on the [fill-front-page](https://github.com/GSMSTCSClub/GSMSTCSClub.github.io/tree/fill-front-page) branch.

Start by reviewing the front-page implementation and the fill-front-page branch linked in the issue. Determine what content should replace or supplement the current network graphic and newsletter button; done means the front page provides useful information such as a calendar or upcoming events rather than only the existing display.

Scritto dal modello di indicizzazione a partire dal testo della issue.