feat: updated backend to support bare react as standalone

backend/src/server/plugins/serve-ui.ts

@@ -0,0 +1,34 @@
+import path from "node:path";
+
+import staticServe from "@fastify/static";
+
+import { IS_PACKAGED } from "@app/lib/config/env";
+
+// to enabled this u need to set standalone mode to true
+export const registerServeUI = async (
+  server: FastifyZodProvider,
+  {
+    standaloneMode,
+    dir
+  }: {
+    standaloneMode?: boolean;
+    dir: string;
+  }
+) => {
+  if (standaloneMode) {
+    const frontendName = IS_PACKAGED ? "frontend" : "frontend-build";
+    const frontendPath = path.join(dir, frontendName);
+    await server.register(staticServe, {
+      root: frontendPath,
+      wildcard: false
+    });
+
+    server.get("/*", (request, reply) => {
+      if (request.url.startsWith("/api")) {
+        reply.callNotFound();
+        return;
+      }
+      void reply.sendFile("index.html");
+    });
+  }
+};