Hello && Welcome
At the beginning of the log file I noticed the above statement. I’m assuming there should be some configurations made or need some reconfiguration done.
So it looks like you didn’t configure you Graylog server.conf file. Probably go back and adjust that. You may have more that needs to be configured.
With the amount of information giving, that is about all the suggestions I can give you. For a better understand what the community will need to help you further, please talk a look at this post for a better understanding.
Thank you
EDIT: to be honest I know a little about Docker but I came across this video which may help