Added support for Fedora.
- Tested on Fedora 29.
- Docker option works.
If you get permission issues, set selinux to permissive.
See how to here: Disable SELinux or Set it to Permissive mode in Fedora 28 / 29, RHEL or CentOS
Postgresql 11 will be installed by default in both Fedora and CentOS.