Squashing all previous migrations into a single file

Get the schema (dump) of the database, which contains the data of the countries table
and the entry in the users table for qa@tunex.io with a preset password.
To get a dump, you need to execute the initial deploy in a new environment, that is,
install Marionette right out of the box.
Shut services down and start service db:
docker-compose down && docker-compose up -d db
Dump the database:
docker-compose exec db mysqldump -u root --password=theSTRONGpassword marionette > schema.sql
Next, in the Backend project, do the following:
Save the database dump obtained in step 3 as schema/schema.sql.
Zip all js-files in api/migrations directory and then delete them:
cd api/migrations && tar -czvf migrations.tar.gz *.js && rm *.js
Release the updated backend and test it in a live database environment.