Bitbucket Pipelines hangs when testing a Nuxt app with Cypress

[theolavaux]

I have a Nuxt app that I want to test with Cypress in CI.
I've seen in the Cypress documentation that you have to install some third-party package to wait for the server to start and then run your tests.
I then installed the wait-on package and created these scripts in package.json.

package.json

{
 "scripts": {
    "start:wait": "yarn start & wait-on http://localhost:3000",
    "run:cypress": "cypress run"  
  },
}

For the CI, I install the dependencies, run nuxt generate to bundle the app and then test using the step below.

bitbucket-pipelines.yml

- step: &e2e-test
  image: cypress/included:9.4.1
  name: Run application E2E tests
  caches:
    - cypress
  script:
    - yarn start:wait
    - yarn record:cypress -- --config video=true --parallel --ci-build-id $BITBUCKET_BUILD_NUMBER
  artifacts:
    # store any generates images and videos as artifacts
    - cypress/screenshots/**
    - cypress/videos/**

# A little bit below
- parallel:
  - step: *e2e-test
  - step: *e2e-test
  - step: *e2e-test

It works when I test it locally but in CI, Bitbucket hangs and nothing happens.

I've also seen the start-server-and-test package but I don't know how to pass extra arguments like (--config video=true --parallel --ci-build-id $BITBUCKET_BUILD_NUMBER) to run:cypress from the CI.

"ci": "start-server-and-test 'yarn start' http://localhost:3000 'run-cypress <extra-arguments-here?>'"

Like this but with arguments from the CI to retrieve $BITBUCKET_BUILD_NUMBER