REBELinBLUE\Deployer\Console\Commands\UpdateApp::verifyInstalled PHP Method

    private function verifyInstalled()
    {
        if (config('app.key') === false || config('app.key') === 'SomeRandomString') {
            $this->block(['Deployer has not been installed', PHP_EOL, 'Please use "php artisan app:install" instead.']);
            return false;
        }
        return true;
    }