Update README.md

README.md

@@ -57,4 +57,9 @@ License
 
 The code in `www` (except `node_modules`) is licensed under the Mozilla Public
 License 2.0.  We didn't write the rest, most of it is autogenerated or third-party.
-Consult `licenses.txt` or the built-in open source info page for details.
+Consult `licenses.txt` or the built-in open source info page for details.
+
+If you're making custom builds and distributing them, you need to [contact us](https://netsyms.com/contact) and
+get permission to use the app name ("NotePost") and icon (`logo.png` and the files in `/res`).
+If you're not customizing anything but simply building the app, you don't need permission,
+but we would love if you contact us and let us know.