Meaning of REDASH environment variables

Hi Redash Team

Thanks for making such a wonderful tool.

Please help me in finding meaning of these redash environment variables and what they do.

REDASH_CELERY_BROKER
REDASH_CELERY_BACKEND
REDASH_STATIC_ASSETS_PATH
REDASH_HOST
REDASH_ADDITIONAL_QUERY_RUNNERS
REDASH_ENABLED_QUERY_RUNNERS
REDASH_EVENT_REPORTING_WEBHOOKS