feat: Add Vercel static builder and routes to serve admin assets.

vercel.json

@@ -4,9 +4,21 @@
     {
       "src": "app.py",
       "use": "@vercel/python"
+    },
+    {
+      "src": "static/**",
+      "use": "@vercel/static"
     }
   ],
   "routes": [
+    {
+      "src": "/admin/assets/(.*)",
+      "dest": "/static/admin/assets/$1"
+    },
+    {
+      "src": "/admin/(.+\\.[a-z]+)$",
+      "dest": "/static/admin/$1"
+    },
     {
       "src": "/(.*)",
       "dest": "app.py"