Cheapest way to run a Laravel website online

Any shared host could potentially host a Laravel application as long as it runs these pre-requirements :

PHP >= 7.1.3
OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension
XML PHP Extension
Ctype PHP Extension
JSON PHP Extension
BCMath PHP Extension

https://laravel.com/docs/5.8#server-requirements

Have you tried this?

https://console.cloud.google.com/