fix: configure Vite proxy to connect frontend to backend

Added proxy configuration to route API requests from frontend (port 5173)
to backend (port 2222). This resolves the issue where the frontend
couldn't fetch notes because it was trying to access the API on the
wrong port.

Changes:
- Changed Vite dev server port from 2222 to 5173
- Added proxy rules for /api and /uploads endpoints
- Both proxies target http://localhost:2222 (backend)

This completes the fix for notes not displaying. The frontend can now
properly communicate with the backend through the proxy.

vite.config.ts

@@ -6,7 +6,17 @@ import path from "path";
 export default defineConfig(() => ({
   server: {
     host: "::",
-    port: 2222,
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:2222',
+        changeOrigin: true,
+      },
+      '/uploads': {
+        target: 'http://localhost:2222',
+        changeOrigin: true,
+      }
+    }
   },
   build: {
     outDir: "dist",