Rename shorter command and add default

subcommands/default

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+ansible_default_cmd() {
+    echo -e 'Usage: dokku ansible[:COMMAND]'
+    echo ''
+    echo 'Run ansible playbooks during deployment'
+    echo ''
+    echo 'Commands:'
+    cat<<help_content
+  ansible:vault-pass, Insert new vault password for encrypt/decrypt of passwords
+help_content
+}
+
+ansible_default_cmd "$@"