Started wizard implementation

manager/javascripts/net.js

@@ -0,0 +1,12 @@
+const portfinder = require('portfinder')
+
+export function checkPort(port, callback) {
+    portfinder.getPort({ port: port, stopPort: port }, (err, res) => {
+        if (err !== null) {
+            console.error(`Port ${port} already in use`);
+            callback(false);
+        } else {
+            callback(true);
+        }
+    });
+}