Given that you are going to throw away every single bit of this code -- yes, you will, and yes, your investors should know about it in advance, and yes, you should set hard numbers for when it's going to happen -- you should build your MVP using whatever toolset will allow you to innovate the fastest while keeping the site up, safe, and secure.
Agreeing with what has already been said about static HTML/CSS/JS on GitHub Pages with AWS buckets, but if Django or Rails works best for you, go with it.
Unless this stack is works-best-for-you, beware launching on React, Typescript, Next.js, or Vercel. That's what you're going to use for the Real Version, when you have money to hire some Real Engineers who are okay with the level of complexity. Don't incur that tech debt before you absolutely must.
Agreeing with what has already been said about static HTML/CSS/JS on GitHub Pages with AWS buckets, but if Django or Rails works best for you, go with it.
Unless this stack is works-best-for-you, beware launching on React, Typescript, Next.js, or Vercel. That's what you're going to use for the Real Version, when you have money to hire some Real Engineers who are okay with the level of complexity. Don't incur that tech debt before you absolutely must.