invoiceninja/config/ninja.php

<?php

return [

    // Marketing links
    'time_tracker_web_url' => env('TIME_TRACKER_WEB_URL'),

    // Hosted plan coupons
    'coupon_50_off' => env('COUPON_50_OFF', false),
    'coupon_75_off' => env('COUPON_75_OFF', false),
    'coupon_free_year' => env('COUPON_FREE_YEAR', false),

];