Update selfhosted-guide.mdx

Updated the backup docker-compose commands

src/pages/selfhosted/selfhosted-guide.mdx

@@ -212,10 +212,11 @@ mkdir backup
 cp docker-compose.yml turnserver.conf management.json backup/
 ```
 To save the Management service databases, you need to stop the Management service and copy the files from the store directory using a docker compose command as follows:
+# These command doesnt work, docker compose should be "docker-compose" and for the container volume copy it should be "docker cp -a management:/var/lib/netbird/ backup/"
 ```bash
-docker compose stop management
-docker compose cp -a management:/var/lib/netbird/ backup/
-docker compose start management
+docker-compose stop management
+docker cp -a management:/var/lib/netbird/ backup/
+docker-compose start management
 ```
 
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