docs(api): add commands to run API scheduler (#6085)

docs/index.md

@@ -98,6 +98,19 @@ Prowler App can be installed in different ways, depending on your environment:
     python -m celery -A config.celery worker -l info -E
     ```
 
+    _Commands to run the API Scheduler_:
+
+    ``` bash
+    git clone https://github.com/prowler-cloud/prowler \
+    cd prowler/api \
+    poetry install \
+    poetry shell \
+    set -a \
+    source .env \
+    cd src/backend \
+    python -m celery -A config.celery beat -l info --scheduler django_celery_beat.schedulers:DatabaseScheduler
+    ```
+
     _Commands to run the UI_:
 
     ``` bash