Import MySQL Dump
Sometimes you just want to import your own MySQL backup file.
This can be done in a very easy way, even without bind-mounting or copying the file into the container. It also does not have to do with dockware, so it would also work in a plain MySQL container.
Run this command, and it will automatically import the backup.sql file from your database folder into your MySQL instance.
docker exec -i shop mysql -uroot -proot shopware < ./database/backup.sql
Copy the backup file into your container. Make sure to place it in the folder /usr/share/adminer
docker cp adminer.sql.gz containerName:/usr/share/adminer/adminer.sql.gz
Now open Adminer in your web browser.
Open the section where you can import a databse dump.
You should now be able to seelct your dump directly in your browser and have Adminer importing it.