refactor: centralize version number on package

[tuliomir]

Acceptance Criteria

• All code paths that require the version number should fetch if from the package.json directly
• The check_version script should validate both application version numbers from the lockfile

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.