chore(index): instructions on testing

Add instructions on how to join the beta or alpha group

Remove the deprecated instructions on translations

Author: kruton

src/content/index.mdx

@@ -25,20 +25,30 @@ If you'd like to support ConnectBot development, you can donate via:
 - [GitHub Sponsors](https://github.com/sponsors/kruton)
 - [BuyMeACoffee](https://buymeacoffee.com/kruton)
 
-# Translations to your language
-
-If you'd like to see ConnectBot translated into your language and you're willing to help, then head on over to [ConnectBot translations at Launchpad](https://translations.launchpad.net/connectbot/trunk/+pots/fortune).
 
 # Available in Google Play Store
 
 *The latest stable version of ConnectBot is [available in the Google Play Store](https://play.google.com/store/apps/details?id=org.connectbot).* You can scan the QR code below using the Barcode Scanner application:
 
 <QRCode value="https://play.google.com/store/apps/details?id=org.connectbot" />
 
-You may also download ConnectBot from our [releases page](https://github.com/connectbot/connectbot/releases). Historical downloads may be available from the old Google Code site [downloads page](https://code.google.com/archive/p/connectbot/downloads).
+## Getting Early Builds
 
----
+ConnectBot is under active development. If you want to get an early build, you can join the open testing group (a.k.a., beta testers). You can also go to the next level and join the elite closed testing group (a.k.a., alpha testers).
+
+### Beta Testers
+
+To join the Beta Testing team, there is one step:
+
+1. [Opt-in to ConnectBot testing](https://play.google.com/apps/testing/org.connectbot)
 
-<p style={{ textAlign: 'right', fontSize: '0.875rem' }}>
-  <a href="https://github.com/connectbot/connectbot.github.io/edit/develop/src/content/index.mdx">Edit this page on GitHub →</a>
-</p>
+### Alpha Testers
+
+To join the Alpha Testing Team, there are two steps:
+
+1. [Opt-in to ConnectBot testing](https://play.google.com/apps/testing/org.connectbot)
+2. [Join the ConnectBot Alpha group](https://groups.google.com/g/connectbot-alpha)
+
+## Getting the APK
+
+You may also download ConnectBot from our [releases page](https://github.com/connectbot/connectbot/releases). Historical downloads may be available from the old Google Code site [downloads page](https://code.google.com/archive/p/connectbot/downloads).