Add ntfy push notifications + mailrise SMTP bridge

- ntfy: self-hosted push notification service (port 8086)
- mailrise: SMTP-to-ntfy converter (port 8025)
- Configs in ./ntfy/server.yml and ./ntfy/mailrise.yml
- Token-based authentication for ntfy
- Updated docs and .gitignore

AGENTS.md

@@ -13,7 +13,7 @@ The infrastructure is split into 5 independent compose files sharing a common `.
 | **Media** | `docker-compose.media.yml` | Media: arr stack, jellyfin, qbittorrent, slskd, metube, maloja, scrobbler |
 | **Documents** | `docker-compose.documents.yml` | Paperless-ngx + AI, onlyoffice, stirling-pdf, open-webui |
 | **Photo & ROM Library** | `docker-compose.photo-roms.yml` | Immich, syncthing, retrom |
-| **Utilities** | `docker-compose.utils.yml` | Gitea, tandoor, speedtest-tracker, rustdesk, redbot, linkwarden, neolink, iperf3 |
+| **Utilities** | `docker-compose.utils.yml` | Gitea, tandoor, speedtest-tracker, rustdesk, redbot, linkwarden, neolink, iperf3, ntfy, mailrise |
 
 ## Core Infrastructure Agents (infra.yml)
 
@@ -115,6 +115,14 @@ The infrastructure is split into 5 independent compose files sharing a common `.
 ### Discord Bots
 - **RedBot** - Discord bot with custom cogs (internal_net)
 
+### Notifications
+- **Ntfy** - Push notification service (port 8086)
+  - Token-based authentication
+  - Subscribable topics: alerts, backups, paperless
+- **Mailrise** - SMTP-to-ntfy bridge (port 8025)
+  - Converts email alerts into push notifications
+  - Works with any service that supports SMTP notifications
+
 ### Network Tools
 - **iperf3-server** - Network performance testing (port 5201)
 
@@ -173,6 +181,7 @@ Networks are defined in `docker-compose.infra.yml` and referenced as `external:
 ├── rustdesk/ (Remote desktop)
 ├── redbot/ (Discord bot)
 ├── stirling/ (PDF tools)
+├── ntfy/ (Notification configs)
 └── Various other service configs
 ```