Discord link added footer homepage

[harry-david-brown]

[ ] Before opening a pull request, please read the contributing guidelines first [ ] If your PR is work in progress, open it as draft [ ] Before requesting a review, all the checks need to pass [ ] Explain what your PR does

[nnamdiarimah]

Looks good, can you add the reddit as well? https://www.reddit.com/r/Rugzombie/ Make sure you git pull on your branch to pull my changes before you make any