fix build and some docs

apps/docs/get-started/nodejs.mdx

@@ -15,19 +15,19 @@ icon: node-js
   <Step title="Install SDK">
     <CodeGroup>
       ```bash npm
-      npm install usesend
+      npm install usesend-js
       ```
 
       ```bash yarn
-      yarn add usesend
+      yarn add usesend-js
       ```
 
       ```bash pnpm
-      pnpm add usesend
+      pnpm add usesend-js
       ```
 
       ```bash bun
-      bun add usesend
+      bun add usesend-js
       ```
     </CodeGroup>
 
@@ -36,7 +36,7 @@ icon: node-js
     Get the API key from the [useSend dashboard](https://app.usesend.com/dev-settings/api-keys) and initialize the SDK
 
     ```javascript
-    import { UseSend } from "usesend";
+    import { UseSend } from "usesend-js";
 
     const usesend = new UseSend("us_12345");
     ```