add msmtp for debug

docker-compose.yml

@@ -1,6 +1,6 @@
 version: '2'
 services:
-  dpo:
+  pmb:
     build:
       context: .
       dockerfile: Dockerfile
@@ -11,19 +11,19 @@ services:
       - .env
     restart: always
     volumes:
-      - dpo_root:/root
+      - pmb_root:/root
       - "/etc/localtime:/etc/localtime:ro"
     networks:
-      - mn
+      - pmb_mailnet
 
   deb:
     image: debian:latest
     tty: yes
     stdin_open: yes
     networks:
-      - mn
+      - pmb_mailnet
 
 networks:
-  mn:
+  pmb_mailnet:
 volumes:
-  dpo_root:
+  pmb_root: