AWS ECS Fargate - is it possible?

Hello. Does anyone know if it’s possible to run Pritunl docker container on AWS ECS Fargate (serverless)? If yes, should I use just Pritunl for it, or pritunl-zero? And second question, will Azure AD work if it is hosted on AWS?

No it would need to make changes to the systems networking. Azure AD will work when the server is run on a EC2 instance, it uses the Oauth API for authenticating with Azure.