fix: do not attempt to transform html requests

Author: yyx990803

packages/vite/src/node/server/middlewares/transform.ts

@@ -32,7 +32,11 @@ export function transformMiddleware(
 
   return async (req, res, next) => {
     let url = removeTimestampQuery(req.url!)
-    if (req.method !== 'GET' || knownIgnoreList.has(req.url!)) {
+    if (
+      req.method !== 'GET' ||
+      req.headers.accept?.includes('text/html') ||
+      knownIgnoreList.has(req.url!)
+    ) {
       return next()
     }