update doc

Author: arch

docs/app/docs/user-guide/developer.md

@@ -0,0 +1,9 @@
+# Notes for Developer
+
+## GitHub Release API
+
+Get all release information:
+
+```bash
+curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/michael-mueller-git/Python-Funscript-Editor/releases
+```