fix: fix bug

server/middlewares/addDevMiddlewares.js

@@ -68,9 +68,10 @@ module.exports = function addDevMiddlewares(app, webpackConfig) {
       const match = proxy2.match(reg);
       const [, pre, host] = match;
       logger.info(`using proxy2 at: ${host}`);
-      logger.info(`proxy2 prefix: ${pre}`);
+      const prefix = `${pre[0] === '/' ? pre : `/${pre}`}`;
+      logger.info(`proxy2 prefix: ${prefix}`);
       app.use(
-        `${pre.indexOf(0) === '/' ? pre : `/${pre}`}`,
+        prefix,
         createProxyMiddleware({
           target: host,
           changeOrigin: true,