refactor: unify command declaration across codebase

plugins/nginx-vhosts/subcommands/access-logs

@@ -6,7 +6,8 @@ source "$PLUGIN_AVAILABLE_PATH/nginx-vhosts/functions"
 
 cmd-nginx-logs() {
   declare desc="display app nginx logs from command line"
-  local cmd="$1"
+  declare cmd="$1"
+
   [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
   nginx_logs "$@"
 }