Ask HN: Is there any service that lets me push code and it automatically scales?

I'm looking for a solution like Heroku where I can push my code to but without the restriction of the limited resources that Heroku provides (without me having to manually upgrade resources).<p>I know ec2 can handle this kind of thing but if I understand correctly, it would still require me to write extra code to start and stop ec2 instances based on traffic.<p>I want to be able to just upload my web app somewhere and have it scale no matter how many requests it get. I shouldn't have to manually purchase resources, that should happen automatically based on the traffic the app is getting and the resources it needs to support that traffic.