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>

gatus/README.md

@@ -11,26 +11,29 @@ Track uptime.
 -   **Documentation:** [Docs](https://gatus.io/)
 -   **Reverse Proxy Port:** `8080`
 
+## Getting Started
+
+1. Start the container: `docker compose up -d`
+2. Open http://localhost:8080 in your browser
+3. Follow the initial setup wizard to configure the application
+
+## Environment Variable Notes
+
+    GATUS_PORT – default: 8080
+
 ## Volume Notes
 
 There are two mounts
 CONFIG_FILE - Where the yaml config file lives.  Likely stored to a repo somewhere.
-VOL_DATA - Which is the persistant data.
+VOL_DATA - Which is the persistent data.
 
-Note the db must be set in the config file for persistant to happen.
+Note the db must be set in the config file for persistent to happen.
 
 There is an example config.yaml file in this repo.
 
-## Dockhand Stack, Deploy from Git
+## Network Notes
 
-Cookbooks Repository
-stackname: Gatus
-Compose file path: gatus/compose.yaml
-Additional env file (optional): gatus/sample.env
-
-Then "Load" gatus/sample.env into the Environmental variables in dockhand, then modify.
-
-Create the Stack
+Requires proxy network
 
 ## Docker Run
 
@@ -43,4 +46,19 @@ docker run -d \
   -v /data/config.yml:/config/config.yaml \
   -v /data/gatus:/config/data \
   twinproduction/gatus:latest
-```
+```
+
+## Additional Notes / Gotchas
+
+Nothing specific to this stack so far.
+
+## Dockhand Stack, Deploy from Git
+
+Cookbooks Repository
+stackname: Gatus
+Compose file path: gatus/compose.yaml
+Additional env file (optional): gatus/sample.env
+
+Then "Load" gatus/sample.env into the Environmental variables in dockhand, then modify.
+
+Create the Stack