It's a bit of a pet peeve for me to see pages like this that are primarily static but are not accessible without JS, but I can understand that making a page built with a JS frontend work without it might be more work than it's worth, at least for an early stage project.
However, you really should put up some sort of notice to users - while being able to read a short blurb about what the site is nice, even just "<noscript>This site requires Javascript to view.</noscript>" is better than a blank page or permanent loading screen.