added mailserver nerdctl network

compose.yml

@@ -2,6 +2,8 @@ services:
   pingvin-share:
     image: stonith404/pingvin-share:latest
     container_name: dropnetignet_pingvin-share
+    networks:
+      - mailserver
     volumes:
       - ./volumes/data:/opt/app/backend/data
       - ./volumes/data/images:/opt/app/frontend/public/img
@@ -10,3 +12,6 @@ services:
     ports:
       - "127.0.0.1:9006:3000"
     restart: unless-stopped
+networks:
+  mailserver:
+    external: true