fix: correct check to see if service is running

This sometimes bizarrely returned a value of 'true' when it wasn't....

common-functions

@@ -279,8 +279,9 @@ service_container_rm() {
   local SERVICE_NAME="$(get_service_name "$SERVICE")"
 
   service_stop "$SERVICE"
-  local ID=$(docker inspect "$SERVICE_NAME" -f '{{ .ID }}' 2> /dev/null || true)
-  [[ -z "$ID" ]] && return 0
+  if ! docker inspect "$SERVICE_NAME" -f '{{ .ID }}' > /dev/null 2>&1; then
+    return 0
+  fi
 
   dokku_log_verbose_quiet "Removing container"
   docker update --restart=no "$SERVICE_NAME" > /dev/null 2>&1