I'd suggest you stear away from using systemd and a server to launch your startup. While this is a good writeup, and you end up with a service, you still need

I'd suggest you stear away from using systemd and a server to launch your startup. While this is a good writeup, and you end up with a service, you still need to manage a machine with all risks involved - server reboots, updates, networking etc. AWS Fargate, or the new App Runner will manage a container almost hassle-free