add docker compose files

docker-compose.rsnapshot.yml

@@ -0,0 +1,14 @@
+services:
+    rsnapshot:
+        container_name: rsnapshot
+        image: linuxserver/rsnapshot:1.4.4
+        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/host_aliases:/host/etc/host_aliases
+        - /mnt/yotta/xenon/rsnapshot:/host/scratch
+        - /root/.ssh:/root/.ssh