Episode 6: Uptime Kuma monitors that mean something, ntfy push server, status page, second eye

Claude-Session: https://claude.ai/code/session_01Y1BTehJjJ4Chr6YscVRXmn

compose.yml

@@ -7,6 +7,7 @@
 #   outline     team wiki (logs in via Forgejo SSO)
 #   vaultwarden password manager (Bitwarden-compatible)
 #   uptime-kuma monitoring + alerts
+#   ntfy        push notifications for those alerts (episode 6)
 #   n8n         automation hub
 #   wg-easy     WireGuard VPN (optional — start with: --profile vpn)
 #               (the full NetBird mesh is in netbird/ — episode 5)
@@ -38,6 +39,8 @@ volumes:
   outline_pg:
   vaultwarden_data:
   kuma_data:
+  ntfy_data:
+  ntfy_cache:
   n8n_data:
   wg_data:
   docker_certs:
@@ -160,6 +163,25 @@ services:
       - kuma_data:/app/data
     networks: [proxy]
 
+  # Push notifications for the monitoring alerts (episode 6).
+  # Uptime Kuma publishes to the topic "alerts", your phone subscribes to it.
+  ntfy:
+    image: binwiederhier/ntfy:v2.28.0
+    restart: unless-stopped
+    command: serve
+    environment:
+      NTFY_BASE_URL: https://ntfy.${DOMAIN}
+      NTFY_BEHIND_PROXY: "true"
+      NTFY_AUTH_DEFAULT_ACCESS: deny-all   # nobody reads or writes without a user
+      NTFY_AUTH_FILE: /var/lib/ntfy/user.db
+      NTFY_CACHE_FILE: /var/cache/ntfy/cache.db
+      NTFY_ATTACHMENT_CACHE_DIR: /var/cache/ntfy/attachments
+      NTFY_ENABLE_LOGIN: "true"
+    volumes:
+      - ntfy_data:/var/lib/ntfy
+      - ntfy_cache:/var/cache/ntfy
+    networks: [proxy]
+
   n8n:
     image: docker.n8n.io/n8nio/n8n:latest
     restart: unless-stopped