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

backend/lib/access/settings-get.json

@@ -0,0 +1,7 @@
+{
+  "anyOf": [
+    {
+      "$ref": "roles#/definitions/admin"
+    }
+  ]
+}