Startup website help, what to include or not? [I will not promote]

I've done a fair amount of work on my app startup including but not limited to a business plan, market research, and several figma documents. What I would like to do next is create a website for my soon-to-be app that I can send to folks who may be interested in supporting or who are just curious. My question is, what should be included? Do I flat out say that I'm open to investors, and how can I say that tastefully? Should I include some mockups from figma (and keep those updated as thing inevitably change)? What things are investors looking for in spaces like this? How can I attract talent? What has been successful for you? I can knock the website out in a day or 3, the app itself is going to take longer so I'd like to get the website taken care of and check it off my list. I'm very new to the business side of things (and this sub) so any and all feedback is greatly appreciated.