Initial: Standalone mixer app with MixerPage, scene management, WS proxy

frontend/vite.config.ts

@@ -0,0 +1,24 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:8081',
+        changeOrigin: true,
+      },
+      '/ws': {
+        target: 'ws://localhost:8081',
+        ws: true,
+      },
+    },
+  },
+  build: {
+    outDir: 'dist',
+    sourcemap: false,
+  },
+})