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>

penpot_dev/README.md

@@ -1 +1,65 @@
 # https://penpot.app/
+
+## Overview
+
+Open-source design and prototyping tool (Figma alternative).
+
+## Project Details
+
+-   **Container Image:** [penpotapp/frontend:latest](https://hub.docker.com/r/penpotapp/frontend)
+-   **Reverse Proxy Port:** `8080`
+
+## Getting Started
+
+1. Start the container: `docker compose up -d`
+2. Open http://localhost:9001 in your browser
+3. Follow the initial setup wizard to configure the application
+
+## Environment Variable Notes
+
+    PENPOT_FLAGS – default: disable-email-verification enable-smtp enable-prepl-server disable-secure-session-cookies
+    PENPOT_PUBLIC_URI – default: http://localhost:9001
+    PENPOT_BODY_SIZE – default: 31457280
+    PENPOT_MULTIPART_SIZE – default: 367001600
+    PENPOT_SMTP_FROM – default: no-reply@example.com
+    PENPOT_TELEMETRY – default: true
+    PENPOT_PORT – default: 9001
+
+## Volume Notes
+
+    /var/lib/postgresql/data – host path /data/penpot/postgres
+    /opt/data/assets – host path /data/penpot/assets
+    /opt/data/assets – host path /data/penpot/assets
+
+## Network Notes
+
+Requires proxy network
+
+## Docker Run
+
+```bash
+docker run -d \
+  --name penpot \
+  -p 9001:8080 \
+  -v /data/penpot/postgres:/var/lib/postgresql/data \
+  -v /data/penpot/assets:/opt/data/assets \
+  -v /data/penpot/assets:/opt/data/assets \
+  penpotapp/frontend:latest
+```
+
+See compose.yaml for the full set of environment variables.
+
+## Additional Notes / Gotchas
+
+Nothing specific to this stack so far.
+
+## Dockhand Stack, Deploy from Git
+
+Cookbooks Repository
+stackname: penpot_dev
+Compose file path: penpot_dev/compose.yaml
+Additional env file (optional): penpot_dev/sample.env
+
+Then "Load" penpot_dev/sample.env into the Environmental variables in dockhand
+
+Create the Stack