How to solve database access problem in docker?

Question

Docker

I don’t understand why periodically there is a problem with accessing the database in the docker,
there are several containers with the database, I start everything ok, I stopped working,
I go into another container, there are problems with the database ,
the error is this:

SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name does not resolve

you have to delete the database that is forwarded to the host machine through volumes, start and roll the dump
if you stop and return to the first project, then the same problem arises there

Answer 1

Dockerfile and connection string to studio