2020/06/17 17:57:58 [error] 24145#24145: *1641373 upstream timed out (110: Connection timed out) while connecting to upstream, client: <my distant IP>, server: <sub.mydomain.fr>, request: "GET /favicon.ico HTTP/1.1", upstream: "http://<the ip of my nas>:<port of the docker container>/favicon.ico", host: "<sub.mydomain.fr>", referrer: "http://sub.mydomain.fr/"