Push it up to a managed PaaS like Heroku. Unless you outsource the scaling and administration tasks, you'll find yourself wasting a lot of time on them,, which as a startup founder you can't afford (you want to focus on development.) If your startup gains any momentum, you'll find yourself having to create a scaling infrastructure from scratch unless you go with a PaaS.
Web applications are about 99% similar to each other. Don't waste time reinventing the wheel when someone else has already done it.