Late to the thread and haven't read anyone else's responses yet, but I get the feeling this is going to be a common refrain; I'd just go with what I'm most familiar with.

Some off the shelf PHP8/Nginx Docker container, Laravel for the API (always pull in php/larastan for enforcing best practices), Maria for the DB, Laravel's Blade/Vue for the front, probably slap it on AWS as that's what I'm most familiar with. I like structured data, I like that modern PHP has (90%) of the safety of Java while being less verbose.