* Explicitly define `mode` in relevant tasks.
* Explicitly define the `nginx` `apt_repository` filename in Debian based distros.
* Building OpenSSL from source should now work properly in CentOS 8.
* Add support to the role for RHEL 8 and Alpine Linux
* Add NGINX Open Source support for Alpine Linux
* Add NGINX Open Source support for SLES 15
* Update supported platforms matrix