The thing that often gets misunderstood is that there's no magic technology that gives a massive competitive advantage here. If you pick Django/Python, PHP/Laravel, Rails, Node, Go, Java, whatever... you end up the same place. Keep it simple, since it will change if your business experiences growth anyways. Pick what you know, or what you want to hire for.

How do you create value for your customers and offer them something that is worth them paying for? Your customer doesn't know/care about the tech behind it. The technology side is a piece of the business puzzle with the goal of shipping your product/service and gaining traction ASAP.

If you don't get traction, the technology side doesn't really matter because the business case isn't there. Ship to market, get feedback, iterate, get more customers and repeat.