Compact home page entries; set up Compose for Arcane git sync

Podium, Spotlight and Grid render smaller on the home page on desktop so
one entry no longer fills the screen; list pages keep full size.

Compose now builds on every deploy (pull_policy: build), stores data in
the canon-data named volume outside the synced folder (CANON_DATA_PATH
overrides), and takes optional bind/port/version settings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -37,6 +37,23 @@ To skip the setup page, set `CANON_ADMIN_USERNAME` and `CANON_ADMIN_PASSWORD` in
 
 Canon listens on all network interfaces (`0.0.0.0`) by default, so phones and other computers on your network can open `http://<this computer's IP>:4242`. When run outside Docker, the startup log prints the exact addresses. If another device can't connect, the host's firewall is probably blocking the port (for example `sudo ufw allow 4242/tcp`). To keep Canon private to one machine, set `CANON_HOST=127.0.0.1`, or publish `127.0.0.1:4242:4242` in `docker-compose.yml`.
 
+### With Arcane (Git sync)
+
+The compose file works as an [Arcane](https://getarcane.app) project synced from this repository:
+
+1. **Projects → New → Git sync**, direction **Pull**, compose file path `docker-compose.yml`.
+2. Turn on **Redeploy after sync** to rebuild whenever you push. `pull_policy: build` makes every deploy build the image from the synced source; it never looks for `canon:latest` on a registry.
+3. Put your settings (admin account, API keys) in the project's environment in Arcane. Arcane writes them to `.env`, which Canon reads.
+
+The database lives in the `canon_canon-data` named volume, outside the synced folder, so a sync can't overwrite or delete it. To use a host folder instead, set `CANON_DATA_PATH` to an absolute path (it must be writable by UID 1000). To move data from an existing `./data` folder into the volume:
+
+```sh
+docker compose stop canon
+docker run --rm -v "$PWD/data:/from" -v canon_canon-data:/to alpine sh -c 'cp -a /from/. /to/ && chown -R 1000:1000 /to'
+```
+
+The compose file joins the external `chromanet` network; create it first (`docker network create chromanet`) or remove the `networks` entries.
+
 ### Without Compose
 
 ```sh