Import dump Sql in Wappler Docker

With Wappler I set up and configured some Docker / Hetzner sites configured with mySql database.
I would like to transfer some tables with their contents to the new database by taking them from the mySql database of the old site
I cannot use Navicat, as the old database server does not allow a direct connection, but I can export a * .sql file
How do I go about importing it?
And do I have to import it into the local development database or the production target database?
Is there a tutorial for this?
Thanks