readded app.js

Author: nikita-1801

app.js

@@ -0,0 +1,13 @@
+const http = require('http');
+
+const port = 3000;
+
+const server = http.createServer((request, respond) => {
+  respond.statusCode = 200;
+  respond.setHeader('Content-Type', 'text/plain');
+  respond.end('Hello!');
+});
+
+server.listen(port, () => {
+  console.log(`Server running on port ${port}`);
+});