Update readme.md

readme.md

@@ -6,12 +6,35 @@ This is useful when there are for users that gains project-level permissions. Th
 
 Another user can have global role of administrator and can gain access to all projects without need of being part of a project.
 
-`master` is replicated from [Grifart GitLab](https://gitlab.grifart.cz/grifart/authorization) back to [github fork](https://github.com/grifart/manogweb-backend-authorization.git).
-
 ## Further sources
 
 - Matej's talk: https://youtu.be/JAYeMsAxZOE?t=12m16s
 - Matej's example repo: https://github.com/matej21/nette-authorization-example/blob/master/app/Core/Security/
 - CampApp issue: https://gitlab.grifart.cz/KampApp/KampApp/issues/6
 - Mango web more complete implementation: https://github.com/mangoweb-backend/authorization
-- Grifart fork: https://gitlab.grifart.cz/grifart/authorization
+- Grifart fork: [gitlab](https://gitlab.grifart.cz/grifart/authorization), [github](https://github.com/grifart/manogweb-backend-authorization/tree/master)
+
+# Contributing
+
+This repository is fork of [mangoweb-backend/authorization](https://github.com/mangoweb-backend/authorization).
+
+Primary development place is [gitlab.grifart.cz](https://gitlab.grifart.cz/grifart/authorization). `master` is automatically replicated back to [github:grifart/manogweb-backend-authorization](https://github.com/grifart/manogweb-backend-authorization.git).
+
+## Submitting contribution into fork
+
+### Internal contributions
+
+Use GitLab and open merge request, target: `master`. After merge it will be automatically propagated to GitHub.
+
+### External contributions
+
+**External developers:** Use GitHub, open pull request targeting [our master `master`](https://github.com/grifart/manogweb-backend-authorization/tree/master).
+
+**Internal reviewer and maintainer:**
+
+- fetch changes to local repo
+- then merge into local `master`
+- push local master into `gitlab/master` (this will be automatically propagated to GitHub)
+- remove branches that are not needed anymore
+
+