docker can't open 4000

[Uranusual]

[Uranusual]

2023-11-07 18:00:57 10:00:57.609 [info] Exporter :otel_exporter_stdout successfully initialized
2023-11-07 18:00:57 10:00:57.659 [warning] Integrated TURN certificate or private key path not specified.
2023-11-07 18:00:57 Integrated TURN will not handle TLS connections.
2023-11-07 18:00:57 
2023-11-07 18:00:57 10:00:57.662 [info] Running Free4chatWeb.Endpoint with cowboy 2.9.0 at 0.0.0.0:4000 (http)
2023-11-07 18:00:57 10:00:57.662 [info] Access Free4chatWeb.Endpoint at http://localhost:4000
2023-11-07 18:00:57 10:00:57.664 [error] ** System NOT running to use fully qualified hostnames **
2023-11-07 18:00:57 ** Hostname 172.26.8.68 is illegal **
2023-11-07 18:00:57 
2023-11-07 18:00:57 10:00:57.664 [warning] [libcluster:free4chat] unable to connect to :"rtc1@172.26.8.68"