Merge pull request modelcontextprotocol#48 from sammyl720/update-typescript-docs-env

Update documentation to include hiding .env

Author: dsp-ant

docs/first-server/typescript.mdx

@@ -41,6 +41,10 @@ This guide uses the OpenWeatherMap API. You'll need a free API key from [OpenWea
     ```bash
     OPENWEATHER_API_KEY=your-api-key-here
     ```
+    Make sure to add your environment file to `.gitignore`
+    ```bash
+    .env
+    ```
   </Step>
 </Steps>