add information about the online instances to the README.md

README.md

@@ -128,3 +128,27 @@ docker exec -it c3lf-sys3-dev-core-1 ./manage.py test`
 realiteme updates in the frontend. the last step in verification before deploying to the staging system using ansible*
 
 
+## Online Instances
+
+These are deployed using `deploy/ansible/playbooks/deploy-c3lf-sys3.yml` and follow a specific git branch.
+
+### 'live'
+
+| URL            | [c3lf.de](https://c3lf.de) |
+|----------------|----------------------------|
+| **Branch**     | live                       |
+| **Host**       | polaris.lab.or.it          |
+| **Debug Mode** | off                        |
+
+This is the **'production' system** and should strictly follow the staging system after all changes have been validated.
+
+### 'staging'
+
+| URL            | [staging.c3lf.de](https://staging.c3lf.de) |
+|----------------|--------------------------------------------|
+| **Branch**     | testing                                    |
+| **Host**       | andromeda.lab.or.it                        |
+| **Debug Mode** | on                                         |
+
+This system ist automatically updated by [git.hannover.ccc.de](https://git.hannover.ccc.de/c3lf/c3lf-system-3/) whenever
+a commit is pushed to the 'testing' branch and the backend tests passed.