feat(build): bundle frontend with vite and matrix-js-sdk, fix HOST in server.js

vite.config.mjs

@@ -0,0 +1,26 @@
+import { defineConfig } from 'vite';
+import { nodePolyfills } from 'vite-plugin-node-polyfills';
+import path from 'path';
+
+export default defineConfig({
+  root: 'public',
+  plugins: [
+    nodePolyfills({
+      include: ['buffer', 'crypto', 'events', 'stream', 'util'],
+      globals: {
+        Buffer: true,
+        global: true,
+        process: true,
+      },
+    }),
+  ],
+  build: {
+    outDir: '../dist',
+    emptyOutDir: true,
+    target: 'esnext',
+    minify: 'esbuild',
+    rollupOptions: {
+      input: path.resolve(import.meta.dirname, 'public/index.html'),
+    },
+  },
+});