chore: Add CORS to vite dev

.vite/server.ts

@@ -1,7 +1,15 @@
-import express from 'express';
+import express, { NextFunction, Request, Response } from 'express';
 import { createServer as createViteServer } from 'vite';
 // import { getBuildConfig } from './build';
 
+const cors = (req: Request, res: Response, next: NextFunction) => {
+  res.header('Access-Control-Allow-Origin', '*');
+  res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
+  res.header('Access-Control-Allow-Headers', 'Content-Type');
+
+  next();
+};
+
 async function createServer() {
   const app = express();
 
@@ -12,6 +20,7 @@ async function createServer() {
     appType: 'custom', // don't include Vite's default HTML handling middlewares
   });
 
+  app.use(cors);
   app.use(express.static('./packages/mermaid/dist'));
   app.use(express.static('./packages/mermaid-example-diagram/dist'));
   app.use(express.static('./packages/mermaid-mindmap/dist'));