docs: document self-hosted F-Droid republish

distribution/README.md

@@ -89,7 +89,17 @@ No GitHub account is used anywhere in this path.
    (or set `FORGEJO_TOKEN` before `release.sh`; the APK upload is then automatic)
 5. Copy the signed APK into the F-Droid repo on the relay host, add a
    `metadata/org.skatespots.app.yml` changelog entry, run `fdroid update`, and
-   sync `repo/` to `/var/www/fdroid/repo/`.
+   sync `repo/` to `/var/www/fdroid/repo/`:
+
+   ```bash
+   cd /home/ubuntu/fdroid
+   cp /path/to/SkateSpots-<version>.apk repo/
+   . /home/ubuntu/fdroid-venv/bin/activate
+   fdroid update
+   sudo rsync -a --delete repo/ /var/www/fdroid/repo/
+   sudo chown -R caddy:caddy /var/www/fdroid
+   ```
+
 6. Verify the public latest-release page contains the new `.apk`, and that
    `https://fdroid.skate-spots.org/repo/index-v2.json` lists the new
    `versionCode`.