link to crowdsec-spoa-bouncer.yaml file update

Author: sabban

crowdsec-docs/unversioned/bouncers/haproxy_spoa.mdx

@@ -99,6 +99,10 @@ configuration file `/etc/crowdsec/bouncer/crowdsec-spoa-bouncer.yaml` should
 already be in a working state, and can skip this section and begin with HAProxy
 Configuration.
 
+If your CrowdSec Engine is installed on an other server, you'll have to [update
+the `/etc/crowdsec/bouncer/crowdsec-spoa-bouncer.yaml`
+file](u/bouncers/haproxy_spoa/#manual-installation-and-advanced-configuration).
+
 
 ## HAProxy Configuration