添加 mysql redis postgres 插件

plugins/postgres/pre-delete

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
+source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/functions"
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+
+APP="$1"
+for SERVICE in $(fn-services-list false); do
+  [[ -n "$SERVICE" ]] || continue
+  dokku_log_verbose_quiet "Unlinking from $SERVICE"
+  remove_from_links_file "$(basename "$SERVICE")" "$APP"
+done