Using aws codebuild pipeline variables in Cypress

Question

I'm having issues using pipeline variables i setup on aws codebuild with cypress. Basically I don't know how to call them from my Cypress code.

Example of my buildspec.yml

version: 0.2
env:
  variables:
    BASE_URL : "CYPRESS_BASE_URL"
    STAGING_USER : "CYPRESS_STAGING_USER"
    STAGING_PASSWORD : "CYPRESS_STAGING_PASSWORD" 
phases:
  install:
    runtime-versions:
      nodejs: latest
    commands:
      - sudo apt update
      - sudo apt-get install -y libgtk2.0-0 libgtk-3-0 libgbm-dev libnotify-dev libnss3 libxss1 libasound2 libxtst6 xauth xvfb
      - cd tests
      - rm /codebuild/global.json -f
      - npm ci
  build:
    commands:
      -  ls -a
      -  npx cypress run --config-file staging.config.ts

Using the example above CYPRESS_BASE_URL is the name of the pipeline env variable I setup like this

Now how do I use the variables in my Cypress code, usually I'll use this from cypress.env.json but I don't use this file on the repo so I can't do that. I need to use variables set on the pipeline or in parameter store. For example in my cypress config I'm confused on how to set the baseUrl from the pipeline variable?

My config file