I built ScaleDynamix[1] with similar goals in mind. It connects to your AWS/GCP/Azure account via terraform and gives you a cpanel like interface to launch sites. You can also horizontally scale the stack either manually or automatically based on utilization. It's optimized for php, but you can run any other languages easily on it.
There is a free version available for non-commercial projects.
There is a free version available for non-commercial projects.
[1] https://scaledynamix.com