Add watchtower

docker/.env.example

@@ -5,6 +5,14 @@ APPS_DIR=
 DATA_DIR=
 DOMAIN=
 
+# Email notifications (watchguard)
+EMAIL_FROM=
+EMAIL_TO=
+EMAIL_SERVER=
+EMAIL_USER=
+EMAIL_PW=
+EMAIL_PORT=
+
 # nextcloud-db
 DB_ROOT_PW=
 DB_NAME=

docker/stacks/watchtower/watchtower.yml

@@ -0,0 +1,27 @@
+version: '3.7'
+
+services:
+   watchtower:
+      image: containrrr/watchtower
+      container_name: watchtower
+      networks:
+         - watchtower
+      environment:
+         - TZ=${TIMEZONE}
+         - WATCHTOWER_MONITOR_ONLY=true
+         - WATCHTOWER_CLEANUP=true
+         - WATCHTOWER_SCHEDULE=0 0 1 * * MON
+         - WATCHTOWER_NOTIFICATIONS=email
+         - WATCHTOWER_NOTIFICATION_EMAIL_FROM=${EMAIL_FROM}
+         - WATCHTOWER_NOTIFICATION_EMAIL_TO=${EMAIL_TO}
+         - WATCHTOWER_NOTIFICATION_EMAIL_SERVER=${EMAIL_SERVER}
+         - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER=${EMAIL_USER}
+         - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD=${EMAIL_PW}
+         - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=${EMAIL_PORT}
+      volumes:
+         - /var/run/docker.sock:/var/run/docker.sock
+      restart: unless-stopped
+
+networks:
+   watchtower:
+      name: watchtower