Set CPU limit for Next build

site/next.config.js

@@ -15,4 +15,8 @@ module.exports = {
     })
     return config
   },
+  // https://answers.netlify.com/t/basic-nextjs-website-failing-to-build-with-exit-code-129/120273/2
+  experimental: {
+    cpus: 1,
+  },
 }