添加 mysql redis postgres 插件

plugins/postgres/commands

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
+[[ " help $PLUGIN_COMMAND_PREFIX:help $PLUGIN_COMMAND_PREFIX $PLUGIN_COMMAND_PREFIX:default " == *" $1 "* ]] || [[ "$1" == "$PLUGIN_COMMAND_PREFIX:"* ]] || exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/help-functions"
+
+if [[ ! -d $PLUGIN_CONFIG_ROOT ]]; then
+  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugin:install"
+fi
+
+if [[ ! -d $PLUGIN_DATA_ROOT ]]; then
+  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugin:install"
+fi
+
+fn-help "$@"