What is the importance of a very good front-end in a startup website [closed]

I want to know your suggestions & views about the front-end importance in a new startup whose only sales channel is their website. Where should a startup website invest their time and resources? On a very High Tech and good looking front-end (UI and UX Both) that will take a very long time to develop but will look excellent. or creating values and providing good service without investing heavily on front-end. Will a normal front-end works if the startup is good at creating value and customer loves? Please do suggest your views/suggestion/experience. Thanks :)