Monitor Only with report notifications

[piksel]

This is an example docker-compose.yaml for running watchtower, only checking for updates once every day at 16:00 and sending notifications (via discord and slack):

version: "3"
services:
  watchtower:
    image: containrrr/watchtower
    container_name: watchtower
    volumes: [/var/run/docker.sock:/var/run/docker.sock]
    env:
      WATCHTOWER_NOTIFICATION_REPORT: "true"
      WATCHTOWER_MONITOR_ONLY: "true"
      WATCHTOWER_NOTIFICATION_URL: >
        discord://token@channel
        slack://watchtower@token-a/token-b/token-c
      WATCHTOWER_NOTIFICATION_TEMPLATE: |
        {{- with .Report -}}
          {{- if ( or .Stale .Failed ) -}}
            {{len .Scanned}} Scanned, {{len .Stale}} Stale, {{len .Failed}} Failed
              {{- range .Stale}}
          - {{.Name}} ({{.ImageName}}): {{.CurrentImageID.ShortID}} has a new image {{.LatestImageID.ShortID}}
              {{- end -}}
              {{- range .Fresh}}
          - {{.Name}} ({{.ImageName}}): {{.State}}
              {{- end -}}
              {{- range .Skipped}}
          - {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
              {{- end -}}
              {{- range .Failed}}
          - {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
              {{- end -}}
            {{- end -}}
          {{- end -}}
        {{- if (and .Entries .Report (or .Report.Stale .Report.Failed)) }}

        Logs:
        {{ end -}}
        {{- range .Entries -}}{{.Time.Format `2006-01-02T15:04:05Z07:00`}} [{{printf `%5.5s` .Level}}] 
        {{.Message}}{{println}}{{- end -}}

      WATCHTOWER_SCHEDULE: "0 0 16 * * *"

See #1806 for more templates.