docs: add text to speech setup guide (#812)

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README.md

@@ -13,6 +13,7 @@ Toolkit is a deployable all-in-one RAG application that enables users to quickly
   - [How to add tools](/docs/custom_tool_guides/tool_guide.md)
   - [How to add auth to your tools](/docs/custom_tool_guides/tool_auth_guide.md)
   - [How to setup Google Drive](/docs/custom_tool_guides/google_drive.md)
+  - [How to setup Google Text-to-Speech](/docs/text_to_speech.md)
   - [How to add authentication](/docs/auth_guide.md)
   - [How to deploy toolkit services](/docs/service_deployments.md)
   - [How to set up Github Actions for automated DB migrations](/docs/github_migrations_action.md)

docs/text_to_speech.md

@@ -0,0 +1,30 @@
+# Google Cloud Text-to-Speech Setup
+
+To use Google Cloud Text-to-Speech, you'll need to create a Google Cloud project and follow the steps below:
+
+## 1. Enable Required APIs
+
+Open the **Google Cloud Console**, navigate to **APIs & Services**, and enable:
+- **Cloud Text-to-Speech API**
+- **Cloud Translation API**
+
+## 2. Create API Credentials
+
+In the **Google Cloud Console**, go to **APIs & Services** > **Credentials**.
+Click **Create Credentials** and select **API key**.
+Copy the generated API key for using in the next step.
+
+## 3. Configure Environment Variable
+
+You can either set the API key in your `.env` file:
+
+```bash
+GOOGLE_CLOUD_API_KEY=<your_api_key>
+```
+
+or update your `secrets.yaml` configuration to contain:
+
+```bash
+google_cloud:
+  api_key:<your_api_key>
+```