Enable Vaultwarden SMTP on mini-pc

Expose Maddy on port 2525 and connect
Vaultwarden and Uptime Kuma to the mail
network for outbound mail delivery.

mini-pc/vaultwarden/docker-compose.yml

@@ -2,7 +2,6 @@ services:
   vaultwarden:
     hostname: vaultwarden
     image: vaultwarden/server:latest
-    network_mode: bridge
     ports:
       - target: 80
         published: "10380"
@@ -13,6 +12,11 @@ services:
       - type: bind
         source: /opt/data/vaultwarden
         target: /data
+    networks:
+      - default
+      - mail
 networks:
   default:
     name: vaultwarden_default
+  mail:
+    external: true