Ask HN: What product/service to create first website for startup?

My product is about ready to launch, and I need a website for marketing/outreach. I'm a competent programmer, but my experience is in scientific computing, not front-end development.

Bootstrap or something similar seems reasonable, but I haven't done any web programming in 15 years. I don't want to spend a lot of time on web development, just want something that looks modern.

Eventually I want to add a customer and payment portals. I may apply for Stripe Atlas, but that's another Ask HN thread.