We’ve built this website very quickly using Notion because we already use it for internal handbooks and project documents. To turn our Notion pages into a (nicer looking) website, we’ve used Potion.
Both of these are no-code (or low-code) which means we can quickly publish something, and then easily change it as we test it. Our friends at Side Labs explain some of the benefits of no and low code.
The icons all come from The Noun Project which can be used for free with attribution (Creative Commons at https://creativecommons.org/licenses/by/3.0/) or for a small fee can be used Royalty free.