module.exports = {
    port: 8000,
    ga: 'UA-XXXXX-X',
    bugira: 'replacethis',
    cron: 'some expression',
    pingdom: {
        user: 'replacethis',
        pass: 'replacethis',
        appkey: 'replacethis'
    }
};

module.exports = {
    port: 8000,
    ga: 'UA-XXXXX-X',
    bugira: 'replacethis',
    cron: '',
    pingdom: {
        user: 'replacethis',
        pass: 'replacethis',
        appkey: 'replacethis'
    }
};

Use empty expression for cron by default
Use empty expression for cron by default

This way it won't fail (nor execute).
