I get a big blank page when js is disabled. If your web design is that lazy it doesn't speak well about your product.
The app? No issues if this is a js web app, makes perfect sense.
But the frontpage, a basically static description of what your product is and why I should use it? That's more of an ask.
I say this because I am working on a product in my spare time and I'm surprised to see how many different areas of expertise are required. (My web site is terrible. And good documentation is tough.)