Add environment variable to make the amount of php-workers configurable (#1588)
Add environment variable to make the amount of php-workers configurable (#1588)

* Add environment variable to make the amount of php-workers configurable

* Add ADDITIONAL_MEDIA_SYNC_WORKER_COUNT env var to azuracast.env

AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,SlvrEagle23/AzuraCast,AzuraCast/AzuraCast,AzuraCast/AzuraCast