Best way to set Cypress base_url globally?

[patrickcate]

It seems like the cypress runner uses http://localhost:8888 as the default base_url. What is the best way to set this variable globally so all tests for a site use a custom one? In non-Drupal projects I'd just put this in the cypress.json file, but the only cypress.json file I see is in the drupal-cypress-environment directory, which is git ignored and seems to get rebuilt with every test run.

I've been able to set a custom base url by running export CYPRESS_BASE_URL=http://local.mysiteimtesting.com && drush cypress:run but I'd prefer not to have to pass in env variables this way.

I appreciate any help with this, and thanks for making this integration module for Drupal.