Fixing docker issues.

README.md

@@ -60,9 +60,16 @@ Since secrets and database files shouldn't be in Git, you need to place them on
 5. Under **Environment variables**, add the following:
    - `HOST_PATH`: `/opt/bookapp` (The folder you created in Step 2)
    - `GEMINI_API_KEY`: `<your-api-key>`
+   - `ADMIN_USERNAME`: `admin` (Or your preferred username)
    - `ADMIN_PASSWORD`: `<secure-password-for-web-ui>`
    - `FLASK_SECRET_KEY`: `<random-string>`
    - `FLASK_DEBUG`: `False` (Set to `True` only for troubleshooting)
+   
+   **Optional (Advanced / Vertex AI):**
+   - `GCP_PROJECT`: Your Google Cloud Project ID (Required for Imagen 3/Vertex AI).
+   - `GCP_LOCATION`: `us-central1` (Default).
+   - `MODEL_LOGIC`: Override the logic model (e.g., `models/gemini-1.5-pro-latest`).
+   - `MODEL_WRITER`: Override the writer model.
 6. Click **Deploy the stack**.
 
 Portainer will pull the code from Git, build the image, and mount the secrets/data from your server folder.