fix: Fixes #24391 (Problems with celery beat running with docker when…

… the machine is rebooted suddenly) (#24392)

Co-authored-by: Alvaro Olmedo <alvaro.olmedo@datadope.io>

docker/docker-bootstrap.sh

@@ -40,6 +40,7 @@ if [[ "${1}" == "worker" ]]; then
   celery --app=superset.tasks.celery_app:app worker -O fair -l INFO
 elif [[ "${1}" == "beat" ]]; then
   echo "Starting Celery beat..."
+  rm -f /tmp/celerybeat.pid
   celery --app=superset.tasks.celery_app:app beat --pidfile /tmp/celerybeat.pid -l INFO -s "${SUPERSET_HOME}"/celerybeat-schedule
 elif [[ "${1}" == "app" ]]; then
   echo "Starting web app..."