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/dead_hosts-update.json

@@ -0,0 +1,23 @@
+{
+  "anyOf": [
+    {
+      "$ref": "roles#/definitions/admin"
+    },
+    {
+      "type": "object",
+      "required": ["permission_dead_hosts", "roles"],
+      "properties": {
+        "permission_dead_hosts": {
+          "$ref": "perms#/definitions/manage"
+        },
+        "roles": {
+          "type": "array",
+          "items": {
+            "type": "string",
+            "enum": ["user"]
+          }
+        }
+      }
+    }
+  ]
+}