How to deploy a Docker image to AWS with the smallest number of CLI commands?

What is the smallest possible number of commands necessary to deploy (and run) a Docker image to AWS using only the CLI?

Assumptions:

• Assume I have a Docker Image already built and tested on my local machine using docker build and docker run
• Assume I have an AWS account and already configured credentials with lab-grade permissions (*:*) for CLI use
• I'm agnostic to the service to be used - ECS, EKS, Beanstalk, Fargate, even unmanaged EC2 - doesn't matter as long as it leads to the shortest possible command line.
• If the CLI refers to some Cloud Formation templates - that's fine

Research so far (UPDATED):

• This article shows how to deploy a standard image: https://appfleet.com/blog/automate-docker-container-deployment-to-aws-ecs-using-cloudformation/ - but it's not clear how I can use my own locally built image instead

UPDATE2

I understand the concept of a container registry and I tried to register my image using the instructions here: https://docs.aws.amazon.com/AmazonECR/latest/userguide/docker-push-ecr-image.html - but the docker login command gives me this error:

Error response from daemon: Get "https://XXXXXXXXXXXXX.dkr.ecr.region.amazonaws.com/v2/": Service Unavailable