add login/sign-up page with dark/light mode

node_modules/eslint-plugin-react/lib/util/docsUrl.js

@@ -0,0 +1,7 @@
+'use strict';
+
+function docsUrl(ruleName) {
+  return `https://github.com/jsx-eslint/eslint-plugin-react/tree/master/docs/rules/${ruleName}.md`;
+}
+
+module.exports = docsUrl;