How to recover n8n

docker ps -a | grep n8n
docker logs n8n --tail 80
cd ~/n8n && docker compose restart
ss -lntp | grep 5678
curl -sI http://127.0.0.1:5678/ | head -5
curl -sI https://n8n.cadenceworks.tech | head -5

Data volume: Docker volume n8n_n8n_data (see n8n reference).