The process of importing a dockerfile from Github integration as compared to our other integrations such as Dockerhub and CLI is different.
In Github we just look at the name of the base image (FROM (image name ) and give base image recommendations if we know it, which means that we only support a subset of public images (all customer-built images will not work here) wheras in dockerhub we pull the image and analyze the dependencies of. in this case we support all images.
The supported distros which we support in Github - Supported Distros