push-keys.md

 You need to add push gateway certificates, which you obtain from Google or Apple. We make use of their REST-API.
 
-We have mounted the credentials outside of docker `/opt/pushgateway/RocketChatMobilePushGateway/credentials/` so we can easily access them.
+We have mounted on heu20 the credentials outside of docker `/opt/pushgateway/RocketChatMobilePushGateway/credentials/` so we can easily access them.
 
 ## Google Firebase