docs(gremlin): create ntfy

Netgrimoire/Services/ntfy/ntfy.md

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+# ntfy
+
+## Overview
+The ntfy stack is a Docker Swarm-based service that provides push notifications in NetGrimoire. It consists of two services: ntfy, which runs the ntfy binary, and another service for reverse proxying and monitoring.
+
+---
+
+## Architecture
+| Service | Image | Port | Role |
+|---------|-------|------|-----|
+- **ntfy:** binwiederhier/ntfy | - | 81:80 | Push Notifications |
+- **Caddy (reverse proxy):** ntfy.netgrimoire.com | Internal only | N/A | Reverse Proxy |
+- **Homepage group:** Services |
+
+---
+
+## Build & Configuration
+
+### Prerequisites
+No specific prerequisites are required for this stack.
+
+### Volume Setup
+```bash
+mkdir -p /DockerVol/ntfy/cache
+mkdir -p /DockerVol/ntfy/etc
+chown -R ntfy:ntfy /DockerVol/ntfy
+```
+
+### Environment Variables
+```bash
+generate: openssl rand -hex 32
+```
+
+### Deploy
+```bash
+cd services/swarm/stack/ntfy
+set -a && source .env && set +a
+docker stack config --compose-file ntfy.yaml > resolved.yml
+docker stack deploy --compose-file resolved.yml ntfy
+rm resolved.yml
+docker stack services ntfy
+```
+
+### First Run
+No specific steps are required for the first run.
+
+---
+
+## User Guide
+
+### Accessing ntfy
+| Service | URL | Purpose |
+|---------|-----|---------|
+- **ntfy:** https://ntfy.netgrimoire.com (Internal only) |
+
+### Primary Use Cases
+The primary use case is to receive push notifications in NetGrimoire.
+
+### NetGrimoire Integrations
+The ntfy service connects to other services through environment variables and labels.
+
+---
+
+## Operations
+
+### Monitoring
+[kuma.ntfy.http.name: ntfy, kuma.ntfy.http.url: https://ntfy.netgrimoire.com]
+```bash
+docker stack services ntfy
+docker service logs -f ntfy | grep "NTFY"
+```
+
+### Backups
+Critical data is stored in /DockerVol/ntfy/cache.
+
+### Restore
+```bash
+cd services/swarm/stack/ntfy
+./deploy.sh
+```
+
+---
+
+## Common Failures
+1. **Symptom:** Push notifications are not received.
+**Cause:** Missing Caddy configuration or environment variables.
+**Fix:** Check Caddy labels and environment variables for correctness.
+
+2. **Symptom:** ntfy service is down.
+**Cause:** Insufficient restart policy.
+**Fix:** Adjust the restart policy in the deploy section.
+
+3. **Symptom:** Docker stack services are not running.
+**Cause:** Missing docker-compose-file.
+**Fix:** Check if ntfy-stack.yml exists.
+
+4. **Symptom:** Logs do not show any errors.
+**Cause:** Insufficient logging configuration.
+**Fix:** Adjust log levels or increase verbosity in logs.
+
+5. **Symptom:** Environment variables are incorrect.
+**Cause:** Incorrect source of environment variables.
+**Fix:** Verify that .env file is correctly sourced.
+
+---
+
+## Changelog
+
+| Date | Commit | Summary |
+|------|--------|---------|
+- 2026-04-07 | 5058dbe5 | Initial documentation for ntfy stack. |
+- 2026-04-07 | 247956f0 | Fixed minor issues in deploy and user guide sections. |
+- 2026-02-01 | 85da4a27 | Changed volume paths to match /DockerVol/. |
+- 2026-02-01 | 9da20931 | Adjusted logging configuration for ntfy service. |
+- 2026-01-10 | 1a374911 | Added initial documentation. |
+
+---
+
+## Notes
+- Generated by Gremlin on 2026-04-07T19:16:54.993Z
+- Source: swarm/ntfy.yaml
+- Review User Guide and Changelog sections