One word of caution about naively porting a regular web app to lambda: since you’re charged for duration, if your app does something like make an API call, you’re paying for duration while waiting on that API call for each request. If that API breaks and hangs for 30s, and you are used to it being (say) a 300ms round trip, your costs have 100xed.
So lambda pricing scales down to cheaper than a VPC, but it also scales up a lot faster ;)
So lambda pricing scales down to cheaper than a VPC, but it also scales up a lot faster ;)