Mounted volume group ownership fix

When attempting to host this image in K8S with a persistent volume, the permission on the postgres directory were not correct. 

```
 Error: The cluster is owned by group id *** which does not exist
```

4.4/init.sh

@@ -65,7 +65,7 @@ fi
 
 # if we use a bind mount then the PG directory is empty and we have to create it
 if [ ! -f /var/lib/postgresql/14/main/PG_VERSION ]; then
-  chown postgres /var/lib/postgresql/14/main
+  chown postgres:postgres /var/lib/postgresql/14/main
   sudo -u postgres /usr/lib/postgresql/14/bin/initdb -D /var/lib/postgresql/14/main
 fi