fehler behoben

express-server/greenlock-https/my-express-app.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var express = require('express');
+var app = express();
+
+app.use('/', function (req, res) {
+  res.setHeader('Content-Type', 'text/html; charset=utf-8');
+  res.end('Hello, World!\n\n💚 🔒.js');
+});
+
+// DO NOT DO app.listen() unless we're testing this directly
+if (require.main === module) { app.listen(3000); }
+
+// Instead do export the app:
+module.exports = app;