Major overhaul

- Docker buildx support in CI
- Cypress API Testing in CI
- Restructured folder layout (insert clean face meme)
- Added Swagger documentation and validate API against that (to be completed)
- Use common base image for all supported archs, which includes updated nginx with ipv6 support
- Updated certbot and changes required for it
- Large amount of Hosts names will wrap in UI
- Updated packages for frontend
- Version bump 2.1.0

frontend/js/app/cache.js

@@ -0,0 +1,10 @@
+const UserModel = require('../models/user');
+
+let cache = {
+    User:    new UserModel.Model(),
+    locale:  'en',
+    version: null
+};
+
+module.exports = cache;
+