fix rsnapshot config

docker-compose.rsnapshot.yaml

@@ -4,10 +4,6 @@ services:
         image: linuxserver/rsnapshot:1.4.5
         restart: unless-stopped
         volumes:
-        - /opt/rsnapshot/etc:/etc/rsnapshot
-        - /opt/rsnapshot/var/log:/var/log
-        - /opt/rsnapshot/var/run:/var/run
-        - /opt/rsnapshot/var/spool:/var/spool
-        - /opt/rsnapshot/usr:/host/usr
+        - /opt/rsnapshot:/config
         - /mnt/yotta/xenon/rsnapshot:/host/scratch
         - /root/.ssh:/root/.ssh:ro