first commit

server/node_modules/has-yarn/index.js

@@ -0,0 +1,9 @@
+'use strict';
+const path = require('path');
+const fs = require('fs');
+
+const hasYarn = (cwd = process.cwd()) => fs.existsSync(path.resolve(cwd, 'yarn.lock'));
+
+module.exports = hasYarn;
+// TODO: Remove this for the next major release
+module.exports.default = hasYarn;