Hi
Sorry for my incompetence.
I'll describe what I've done but I still have the DB Error.
I've instaled a new mariadb instance, an left it like this:
After that, I configured I tried to methods, first I mounted a new WP docker but it didn't worked.
I cleaned all up and Installed again the mariadb, entered through console and create a new wordpress database, here you can see the TablePlus info:
After that I created again another WP docker like this:
As I said, I still have the "Error establishing a database connection".
Here it is the resume form the Docker panel:
I've read this thread several times, but I still can't figure out what I am doing wrong.
Thanks for your help.