it's really depends on that you are trying to build but in general you need to use tools you know and you can save some time by using PaaS services like 'heroku

it's really depends on that you are trying to build but in general you need to use tools you know and you can save some time by using PaaS services like 'heroku' because those will allow to focus on your product code instead of infrastructure and also you have to only write code that not possible to outsource to external services/solutions.