Changed frontend from Liquid to React, fixed bug where server would check for updates twice

web/src/types.ts

@@ -0,0 +1,12 @@
+export type Data = {
+  metrics: {
+    monitored_images: number;
+    up_to_date: number;
+    update_available: number;
+    unknown: number;
+  };
+  images: {
+    [key: string]: boolean | null;
+  };
+  last_updated: string;
+};