Is your feature request related to a problem? Please describe.
CentOS 8 is not available in some private cloud setups, create alternative builder based on centos7
Describe the solution you'd like
Travis ci can build in addition to centos 8 an image based on centos 7
Describe alternatives you've considered
As alternative we could create a seperate dockerhub repository for this and build it from the same github repository to avoid code duplication
Is your feature request related to a problem? Please describe. CentOS 8 is not available in some private cloud setups, create alternative builder based on centos7
Describe the solution you'd like Travis ci can build in addition to centos 8 an image based on centos 7
Describe alternatives you've considered As alternative we could create a seperate dockerhub repository for this and build it from the same github repository to avoid code duplication
Additional context /