Add vite server back

.vite/server.ts

@@ -0,0 +1,29 @@
+import express from 'express';
+import cors from 'cors';
+import { createServer as createViteServer } from 'vite';
+
+async function createServer() {
+  const app = express();
+
+  // Create Vite server in middleware mode
+  const vite = await createViteServer({
+    configFile: './vite.config.ts',
+    mode: 'production',
+    server: { middlewareMode: true },
+    appType: 'custom', // don't include Vite's default HTML handling middleware
+  });
+
+  app.use(cors());
+  app.use(express.static('./packages/mermaid/dist'));
+  app.use(express.static('./packages/mermaid-zenuml/dist'));
+  app.use(express.static('./packages/mermaid-example-diagram/dist'));
+  app.use(vite.middlewares);
+  app.use(express.static('demos'));
+  app.use(express.static('cypress/platform'));
+
+  app.listen(9000, () => {
+    console.log(`Listening on http://localhost:9000`);
+  });
+}
+
+createServer();