Why is the local docker responding to all requests with 404, while the year before was working fine?

Question

Docker

There is a configured local docker. Today all of a sudden everything stopped working without any changes in the configs. For all requests, nginx sends 404. So it works! :) All containers are running (and restarted). I see them in processes. However, 404 Not Found. In ​access logs you can see that I'm knocking. The error log is empty. I will be glad to any ideas.
Thanks

Answer 1

If nothing has changed in the docker, then something has changed outside, for example, DNS.
In addition, it is not clear where nginx is inside containers or in front of them, like a balancer.
If the second option, then you can try curl into containers directly from it and at the same time you need to figure out why 404 is not written to error.log, maybe something has changed here, for example, the package has updated itself.
Then act on the results.