docs: add package manager switching to index.md

docs/guide/index.md

@@ -51,12 +51,22 @@ Alternatively, you can use `onsolve=""` directly within the widget or wrap the w
 
 Cap is fully self-hosted, so you'll need to start a server with the Cap API running at the same URL as specified in the `data-cap-api-endpoint` attribute. This is easy since we've already pre-made a library to help you generate and validate challenges for you.
 
-Start by installing it using npm or bun:
+Start by installing it:
 
+::: code-group
+
+```bash [bun]
+bun add @cap.js/server
 ```
+
+```bash [npm]
 npm i @cap.js/server
 ```
 
+```bash [pnpm]
+pnpm i @cap.js/server
+```
+
 > [!NOTE]
 > It is recommended to use at least Node.js 14 or Bun 1.0.0. You might experience multiple issues on older versions of these runtimes.
 
@@ -190,4 +200,4 @@ Once the token is generated and captured, you can use it later to validate the u
 await cap.validateToken("..."); // returns { success: Boolean }
 ```
 
-Note that the token will immediately be deleted after this. To prevent this, use `await cap.validateToken("...", { keepToken: true })`.
+Note that the token will immediately be deleted after this. To prevent this, use `await cap.validateToken("...", { keepToken: true })`.