Set the right eslint-env for configuration files

sergioalvz · sergioalvz · commit 935b6216a9bb · 2023-02-05T20:45:18.000+01:00
diff --git a/next.config.js b/next.config.js
@@ -1,3 +1,5 @@
+/* eslint-env node */
+
 /**
  * @type {import('next').NextConfig}
  */
