fix: add autoPort && prometheus port discovery

Author: icey-yu

.env

@@ -15,3 +15,8 @@ OPENIM_ADMIN_FRONT_IMAGE=openim/openim-admin-front:release-v1.8.4
 #OPENIM_ADMIN_FRONT_IMAGE=registry.cn-hangzhou.aliyuncs.com/openimsdk/openim-admin-front:release-v1.8.4
 
 DATA_DIR=./
+
+PROMETHEUS_PORT=19091
+ALERTMANAGER_PORT=19093
+GRAFANA_PORT=13000
+NODE_EXPORTER_PORT=19100