Update documentation with new features and requirements

DOCUMENTATION.md

@@ -24,6 +24,8 @@ OpenChat Overlay is a lightweight, open-source Twitch chat overlay solution desi
     TWITCH_CLIENT_ID=...
     TWITCH_CLIENT_SECRET=...
     ```
+    > **Note:** `TWITCH_CLIENT_ID` and `TWITCH_CLIENT_SECRET` are required for both User Authentication (NextAuth) and the Support Module (Stream Status).
+
 4.  Run the development server:
     ```bash
     npm run dev
@@ -33,6 +35,15 @@ OpenChat Overlay is a lightweight, open-source Twitch chat overlay solution desi
 - The application uses **Next.js App Router**.
 - **Dashboard:** Located in `src/app/(dashboard)`. Protected by authentication.
 - **Overlay:** Located in `src/app/overlay/[token]`. Publicly accessible but requires a valid token. Renders with a transparent background.
+- **API:**
+    - `/api/auth/*`: Handles user login via Twitch.
+    - `/api/twitch/status`: Public endpoint to check if the developer (`ramforth`) is live, used by the dashboard support module.
+
+## Features
+- **Style Creator:** Customise font, size, colors, opacity, and toggle badges/emotes.
+- **Resolution Support:** Toggle between 720p and 1080p base resolutions.
+- **Live Preview:** Real-time visual feedback of chat settings.
+- **Support Module:** Sidebar widget showing developer status and social links.
 
 ## Deployment
 
@@ -45,5 +56,4 @@ OpenChat Overlay is a lightweight, open-source Twitch chat overlay solution desi
 ### Deployment Workflow
 1.  Push changes from local development machine to Gitea.
 2.  Pull changes on the production LXC/VM.
-3.  Build and run using Docker or as a systemd service.
-
+3.  Build and run using Docker or as a systemd service.