add supabase file server and downloader

js-server/package.json

@@ -13,6 +13,7 @@
   "dependencies": {
     "@fastify/mongodb": "^10.0.0",
     "@fastify/static": "^9.0.0",
+    "@supabase/supabase-js": "^2.98.0",
     "adm-zip": "^0.5.16",
     "dotenv": "^17.3.1",
     "fastify": "^5.7.4",