chore(cd): publish nginx on port 8082 to avoid Coolify port conflicts

.gitea/workflows/cd.yml

@@ -69,7 +69,8 @@ jobs:
           ADMIN_SESSION_TTL_HOURS=12
 
           # Nginx
-          NGINX_PORT=80
+          # Host port 80/443 (Coolify Traefik) and 8080 are taken; nginx publishes on 8082.
+          NGINX_PORT=8082
           EOF
 
       - name: Seed Prometheus config on remote host