I'm soon to be done with my Dockerised project that I expect to be popular. Where should I host it that's affordable, but scaleable if needed?

Aws

@eskizo Can you point me to an "AWS for absolute idiots" guide?

Well, I never tried, but aws when you first log in to the console has some, "start your ec2 instance in 2 min" totorials. Ec2 would be the machine you are going to put online. But I am pretty sure they have services ready to deploy docker containers that you don't even think about the instance. For starters I guess you should set up a aws account and confirm email telephone and credit card and stuff, then start exploring. You will provide payment but there will be a lot of Free Tier services that will charge will charge you nothing.