Add note for rsync deploy command (#1415)

Co-authored-by: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
Co-authored-by: Christian Oliff <christianoliff@pm.me>

content/en/hosting-and-deployment/deployment-with-rsync.md

@@ -100,7 +100,7 @@ USER=my-user
 HOST=my-server.com
 DIR=my/directory/to/topologix.fr/   # the directory where your web site files should go
 
-hugo && rsync -avz --delete public/ ${USER}@${HOST}:~/${DIR}
+hugo && rsync -avz --delete public/ ${USER}@${HOST}:~/${DIR} # this will delete everything on the server that's not in the local public folder 
 
 exit 0
 ```