docs(gremlin): create wiki

Netgrimoire/Services/wiki/wiki.md

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+# wiki
+
+## Overview
+This stack provides a Wiki.js service in NetGrimoire, offering documentation for various services and features.
+
+---
+
+## Architecture
+| Service | Image | Port | Role |
+|:---------|-------:|-----:|------|
+| **wikijs** | `requarks/wiki:2` | 3000 | Documentation Server |
+
+Exposed via:
+- `caddy.netgrimoire.com`
+- Internal only
+
+Homepage group:
+- `Documentation`
+
+---
+
+## Build & Configuration
+
+### Prerequisites
+No specific prerequisites for this stack.
+
+### Volume Setup
+```bash
+mkdir -p /DockerVol/wikijs/data
+chown -R wikijs:wikijs /DockerVol/wikijs
+```
+
+### Environment Variables
+```bash
+DB_TYPE=postgres
+DB_HOST=wikijs-db
+DB_PORT=5432
+DB_USER=wikijs
+DB_PASS=F@lcon13
+TZ=America/Chicago
+DB_NAME=wiki
+```
+
+### Deploy
+```bash
+cd services/swarm/stack/wiki
+set -a && source .env && set +a
+docker stack config --compose-file wiki-stack.yml > resolved.yml
+docker stack deploy --compose-file resolved.yml wiki
+rm resolved.yml
+docker stack services wiki
+```
+
+### First Run
+Run `caddy` command to start the reverse proxy and make the service accessible.
+
+---
+
+## User Guide
+
+### Accessing wiki
+| Service | URL |
+|---------|-----|
+- **wikijs** | https://wiki.netgrimoire.com |
+
+### Primary Use Cases
+Use this service for documentation purposes, such as updating wiki pages or contributing to the wiki.
+
+### NetGrimoire Integrations
+Connects to `drawio` and other services via Kuma labels.
+
+---
+
+## Operations
+
+### Monitoring
+Kuma monitors:
+```bash
+docker stack services wiki
+<docker service logs commands>
+```
+
+### Backups
+Critical vs reconstructable `/DockerVol/wikijs/data` volume.
+
+### Restore
+Run `./deploy.sh` to restore the service.
+
+---
+
+## Common Failures
+| Symptom | Cause | Fix |
+|---------|------|-----|
+| ...     | ...  | ... |
+
+---
+
+## Changelog
+
+| Date | Commit | Summary |
+|------|--------|---------|
+| 2026-05-01 | 95df17bf | Initial documentation and build configuration |
+| 2026-05-01 | c3b0c0f5 | Updated Caddy labels for reverse proxying |
+| 2026-02-10 | e6ffa042 | Fixed bug in Postgres database connection |
+| 2026-01-26 | 361a325b | Added environment variables for Wiki.js configuration |
+| 2026-01-25 | 5fc017f4 | Updated Docker stack deployment script |
+
+<Write a paragraph summarizing the evolution of this service based on the diffs above. If no diffs available, note that this is the initial documentation.>
+
+---
+
+## Notes
+- Generated by Gremlin on 2026-05-01T20:36:07.591Z
+- Source: swarm/wiki.yaml
+- Review User Guide and Changelog sections