Update docs

README.md

 ## The GHCup Haskell installer
 
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docs/css/extra.css

@@ -20,6 +20,19 @@ code.no-highlight {
     color: black;
 }
 
+div.gh-badge img {
+	margin: 0;
+	padding: 0;
+	height: 30px;
+}
+
+a.donate-badge img {
+	margin-top: 10;
+	margin-bottom: 0;
+	padding: 0;
+	height: 50px;
+}
+
 /* Definition List styles */
 
 dd {

docs/index.md

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 GHCup is an installer for the general purpose language [Haskell](https://www.haskell.org/).
 
+<div class="text-center gh-badge">
+<a href="https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup"><img src="https://img.shields.io/badge/chat-on%20libera%20IRC-brightgreen.svg" alt="Join the chat at Libera.chat"></a>
+<a href="https://app.element.io/#/room/#haskell-tooling:matrix.org"><img src="https://img.shields.io/matrix/haskell-tooling:matrix.org?label=chat%20on%20matrix.org" alt="Join the chat at Matrix.org"></a>
+<a href="https://discord.gg/pKYf3zDQU7"><img src="https://img.shields.io/discord/280033776820813825?label=chat%20on%20discord" alt="Join the chat at Discord"></a>
+<a href="https://gitter.im/haskell/ghcup?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge"><img src="https://badges.gitter.im/haskell/ghcup.svg" alt="Join the chat at https://gitter.im/haskell/ghcup"></a>
+</div>
+
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 GHCup makes it easy to install specific versions of GHC on GNU/Linux,
@@ -19,6 +26,10 @@ It follows the unix UNIX philosophy of [do one thing and do it well](https://en.
 <a href="install/" class="btn btn-primary" role="button">Getting Started</a>
 <a href="guide/" class="btn btn-primary" role="button">User Guide</a>
 </div>
+<div class="text-center">
+<a href="https://opencollective.com/ghcup#category-CONTRIBUTE" class="donate-badge"><img src="https://opencollective.com/webpack/donate/button@2x.png?color=blue" alt="Donate"></a>
+</div>
+
 
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