add supabase file server and downloader

src-react/src/lib/supabaseClient.ts

@@ -0,0 +1,6 @@
+import { createClient } from "@supabase/supabase-js";
+
+const supabaseUrl = import.meta.env.VITE_SUPABASE_URL;
+const supabasePublishableKey = import.meta.env.VITE_SUPABASE_PUBLISHABLE_KEY;
+
+export const supabase = createClient(supabaseUrl, supabasePublishableKey);