Any PaaS provider likely supports Docker at this point. AWS Elastic Beanstalk, GCP App Engine (I think, not a GCP user myself), Heroku, and DO and Azure have so

Any PaaS provider likely supports Docker at this point. AWS Elastic Beanstalk, GCP App Engine (I think, not a GCP user myself), Heroku, and DO and Azure have some as well, I just don't know the name. I have experience with Heroku and AWS Elastic Beanstalk, and both were very simple setups. Install the CLI, run the commands in the docs to push your image to their service, done. I think this should meet your requirements.