Update readme.

README.md

@@ -8,6 +8,11 @@
 4. Add the json contents into the example file under `.google.credentials` and fill in the rest of the options.
 5. To synchronize once run `./main.py --config config.yaml`.
 
+## CI
+
+There is a concourse pipeline which runs once every hour to synchronize all events. It reads the configuration
+file from the concourse vault and passes it to the script.
+
 ## Known issues
 
 If two Events are booked on the same date, only one of them will appear