README.md: Add notes on branches

README.md

@@ -12,6 +12,11 @@ This is what you want to do to update the mastofe bundled with pleroma.
   - ``git commit -m "update mastofe"``
 
 # Development
+## Branches
+- `pleroma` branch which merges from `rebase/glitch-soc` once it is stable
+- `rebase/glitch-soc`: branch which rebases from upstream, used for testing
+- Development branches are targeting `rebase/glitch-soc` and thus can need a frequent rebase
+
 ## Tools
 - Node.js
 - yarn (preferred) or npm