Use existing Caddy for sx-web.org routing

Single Caddy instance handles all domains. sx-web stack joins
externalnet instead of running its own Caddy (port conflict).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -102,6 +102,8 @@ jobs:
                 docker stack deploy -c /root/sx-web/docker-compose.yml sx-web
                 sleep 5
                 docker stack services sx-web
+                # Reload Caddy to pick up any Caddyfile changes
+                docker service update --force caddy_caddy 2>/dev/null || true
               fi
             else
               echo 'Skipping swarm deploy (branch: ${{ github.ref_name }})'