added diun

docker/diun/compose.yml

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+services:
+  diun:
+    image: crazymax/diun:latest
+    command: serve
+    container_name: diun
+    volumes:
+      - "./data:/data"
+      - "/var/run/docker.sock:/var/run/docker.sock"
+      - "./diun.yml:/diun.yml:ro"
+    environment:
+      # general settings
+      - "TZ=Europe/Berlin"
+    restart: always

docker/diun/data/images-to-monitory.yml

@@ -0,0 +1,2 @@
+- name: caddy:2-builder
+- name: caddy:2

docker/diun/diun.yml

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+watch:
+  workers: 20
+  schedule: "0 */6 * * *"
+  firstCheckNotif: false
+  jitter: "30s"
+
+providers:
+  docker:
+    watchByDefault: true
+  file:
+    filename: /data/images-to-monitor.yml
+
+notif:
+  ntfy:
+    endpoint: https://notify.grobecker.me
+    topic: diun
+    priority: 3
+    templateTitle: "[diun hetzner] {{ .Entry.Image }} released"
+    templateBody: |
+      Docker tag {{ .Entry.Image }} which you subscribed to through {{ .Entry.Provider }} provider has been released.

docker/diun/info.md

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+This here is the config for diun on my _hetzner_-instance, meaning that my _raspi_-instance is slightly different\
+For example: _hetzner_ uses a dedicated file while _raspi_ uses environment-variables