add back basePath for vercel

Author: brbcoding

next.config.js

@@ -2,8 +2,12 @@ const withBundleAnalyzer = require("@next/bundle-analyzer")({
   enabled: false, //process.env.ANALYZE === 'true',
 });
 
+const isProd = process.env.VERCEL_ENV === "production"; // or NODE_ENV === 'production'
+
 module.exports = withBundleAnalyzer({
   swcMinify: true,
   reactStrictMode: true,
   output: "standalone",
+  basePath: isProd ? "/try/sandbox" : "",
+  assetPrefix: isProd ? "/try/sandbox/" : "",
 });