[DBBackup] Add wekan network

pica-db-backup/docker-compose.yml

@@ -7,6 +7,8 @@ networks:
     name: "etherpad_week"
   plume:
     name: plume
+  wekan:
+    name: "wekan"
   docker_default:
     external: true
     name: "docker_default"
@@ -26,4 +28,5 @@ services:
       - etherpad_main
       - etherpad_week
       - plume
+      - wekan
     restart: unless-stopped