Closes #57: Test that beacon script captures right image on template

[jeawhanlee]

Description

Test that the Beacon script returns expected LCP & ATF

Fixes #57

Documentation

Technical documentation

• First install new dependencies, npm install
• Need to add necessary SSH credentials in the wp.config

  WP_ENV_TYPE = 'external',
  WP_SSH_USERNAME = '',
  WP_SSH_ADDRESS = '',
  WP_SSH_KEY = 'path/to/private/key',
  WP_SSH_ROOT_DIR = '/path/to/e2e/root/dir/on/server'
  

• To run we have a new script: npm run test:lcp

Type of change

• New feature (non-breaking change which adds functionality).

New dependencies

Axios for getting PSI data.

[Khadreal]

LGTM

[Mai-Saad]

Working fine for sample test data (tests are failing either cause of known issue or case that needs investigation)

Next:
1- add the rest of test data (can be on separate PR)