Add docker-compose configuration for watchtower service

watchtower/docker-compose.yml

@@ -0,0 +1,48 @@
+version: "3"
+services:
+  watchtower:
+    image: containrrr/watchtower
+    container_name: watchtower
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - /etc/localtime:/etc/localtime:ro
+    environment:
+      WATCHTOWER_SCHEDULE: 0 0 1 * * *
+      #TZ: America/New_York
+      WATCHTOWER_CLEANUP: "true"
+      WATCHTOWER_DEBUG: "true"
+      WATCHTOWER_NOTIFICATION_REPORT: "true"
+      WATCHTOWER_NOTIFICATION_URL: >
+        discord://YourDiscordBotToken@YourDiscordID
+
+        generic://discord.com/api/webhooks/YourDiscordID/YourDiscordBotToken
+#        slack://watchtower@xoxe.xoxp-1-Mi0yLTUTExNDExNzAtNTMzAwNzYzOsdfDUxOC01ODM5NTg1MTY1ODkxLTU4NDIaxMjUwNzY0NjgtBiNTkwZTY1ZTg5NGE4MGQzOWIwxZThkNjkwMTE0NzE3NdWM0YzU0MmYzZjeg4MTE5YzNmMDY3YmMyNmNflZTI2ZA@C05Q939CGTZ
+      WATCHTOWER_NOTIFICATION_TEMPLATE: |
+        {{- if .Report -}}
+          {{- with .Report -}}
+        {{len .Scanned}} Scanned, {{len .Updated}} Updated, {{len .Failed}} Failed
+              {{- range .Updated}}
+        - {{.Name}} ({{.ImageName}}): {{.CurrentImageID.ShortID}} updated to {{.LatestImageID.ShortID}}
+              {{- end -}}
+              {{- range .Fresh}}
+        - {{.Name}} ({{.ImageName}}): {{.State}}
+            {{- end -}}
+            {{- range .Skipped}}
+        - {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
+            {{- end -}}
+            {{- range .Failed}}
+        - {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
+            {{- end -}}
+          {{- end -}}
+        {{- else -}}
+          {{range .Entries -}}{{.Message}}{{"\n"}}{{- end -}}
+        {{- end -}}
+    restart: always
+    stdin_open: true    # to attach to containers
+    tty: true           # also used to attach to containers
+#    network_mode: service:wireguard     # To run through vpn service container, in turn UI port must be forwarded inside vpn. No local access unless otherwise defined
+    networks:           # Specify network for container
+      - homelab
+networks:    # I don't know why but you have to specify the network 2x. In service, and in this tag area..
+  homelab:
+    external: true      # This option causes compose to join the above network instead of making a _default one (supposedly)