Better homepage and add github to header

client/pages/index.tsx

@@ -28,7 +28,7 @@ const Home = ({ theme, changeTheme }: ThemeProps) => {
 - User authentication
 - Private, public, and secret posts
 
-If you want to signup, you can join at [/signup](/signup) as long as you have a passcode provided by the administrator. If you're already signed in, you can create a new post by clicking the "New" button in the header. This demo is on a memory-only database, so accounts and pastes can be deleted at any time.
+If you want to signup, you can join at [/signup](/signup) as long as you have a passcode provided by the administrator (which you don't need for this demo). If you're already signed in, you can create a new post by clicking the "New" button in the header. This demo is on a memory-only database, so accounts and pastes can be deleted at any time.
 
 Drift was inspired by [this tweet](https://twitter.com/emilyst/status/1499858264346935297):
 > What is the absolute closest thing to GitHub Gist that can be self-hosted?