What is the cheapest solution you can suggest, that is not AWS?
I never understood how AWS work to be honest with you and hearing or reading all these scary stories with overcharging gives me nightmares, just by thinking about it...
Any suggestions please?
You may have a better experience with AWS AppDeploy or Elastic Beanstalk, which can be very cheap (all free tier).
Heroku is probably the easiest, but it's extremely expensive if you need anything beyond the free tier.