complete all stack READMEs to the 9-section template

Existing content preserved and reordered to the canonical section order;
missing sections generated from each stack's compose data (ports, volumes,
env vars, image links). Fixes copy-paste errors in Dockhand sections
(qbittorrent pointed at archivebox; invokeai/thunderbird said SERVICENAME)
and persistant->persistent typos in gatus.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

nextcloud/README.md

@@ -3,6 +3,65 @@
 Docker Hub: https://hub.docker.com/_/nextcloud
 Proxy Port: 80
 
+## Overview
+
+Self-hosted file sync, sharing, and collaboration platform.
+
+## Project Details
+
+-   **Container Image:** [mariadb:latest](https://hub.docker.com/_/mariadb)
+-   **Reverse Proxy Port:** `n/a`
+
+## Getting Started
+
+1. Start the container: `docker compose up -d`
+2. Open http://localhost:PORT in your browser
+3. Follow the initial setup wizard to configure the application
+
+## Environment Variable Notes
+
+    NEXTCLOUD_DB – default: nextcloud
+    MARIADB_ROOT_PASSWORD – default: ChangeThisPassword
+    NEXTCLOUD_DB_USER – default: nextcloud
+    NEXTCLOUD_DB_PASSWORD – default: ChangeThisPassword
+    NEXTCLOUD_DB_HOST – default: nextcloud-db
+
+## Volume Notes
+
+    /var/lib/mysql – host path /data/nextcloud/db
+    /var/www/html – host path /data/nextcloud/data
+
+## Network Notes
+
+Requires proxy network
+
+## Docker Run
+
+```bash
+docker run -d \
+  --name nextcloud \
+  -v /data/nextcloud/db:/var/lib/mysql \
+  -v /data/nextcloud/data:/var/www/html \
+  mariadb:latest
+```
+
+See compose.yaml for the full set of environment variables.
+
+## Additional Notes / Gotchas
+
+See `compose-aio.yaml` in this directory for the Nextcloud All-in-One variant.
+
+## Dockhand Stack, Deploy from Git
+
+Cookbooks Repository
+stackname: nextcloud
+Compose file path: nextcloud/compose.yaml
+Additional env file (optional): nextcloud/sample.env
+
+Then "Load" nextcloud/sample.env into the Environmental variables in dockhand
+
+Create the Stack
+
 ## Useful commands
 
 ```bash
@@ -12,4 +71,4 @@ sudo -u www-data php occ maintenance:mode --on
 php occ trashbin:cleanup --all-users
 
 docker-compose exec --user www-data nextcloud php occ
-```
+```