add doc for auto ticket

README.md

@@ -27,10 +27,22 @@ Hints:
 * API user setup only runs once at start up!
 * Redis conf runs every time
 
+If you plan to use satellites and wish full auto deployment.   
+Set ICINGA2_API_USER_SATELLITE_PASS to get a API user for ticket generation (only on fist init).  
+
+Then you can use this: 
+```
+curl -k -s -u pki-ticket:$ICINGA2_API_USER_SATELLITE_PASS -H 'Accept: application/json' \
+ -X POST 'https://ip-of-icinga2:5665/v1/actions/generate-ticket' -d '{ "cn": "satellite.example.com" }'
+```
+
+see: [CSR Auto-Signing: On the master](https://icinga.com/docs/icinga-2/latest/doc/06-distributed-monitoring/#csr-auto-signing-on-the-master)
+
 ## vars 
 
 var | description | note 
 --- | --- | ---
+ICINGA_API_HOST:-icinga2 | hostname / cn of icinga2 | 
 ICINGA2_API_USER_ROOT_PASS | replace `root` API user randome password with this | only on first setup
 ICINGA2_API_USER_ICINGAWEB_PASS | create API user `icingadb` with this password | only on first setup, if not set user will not create
 ICINGA2_API_USER_SATELLITE_PASS | create API user `pki-ticket` with this password | only on first setup, if not set user will not create