chore: add nebula assets to proxy server

nebula/src/main.ts

@@ -0,0 +1,2 @@
+// src/ts/main.ts
+console.log("Hello from TypeScript!");

nebula/src/styles.css

@@ -0,0 +1,6 @@
+/* src/css/styles.css */
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* Custom styles */