ehsanrocket

add `sed -i 's/15.0/15.1/g' /etc/zypp/repos.d/*` to the first line of the `RUN` command in Dockerfile and change the all `15.0` to `15.1` ``` FROM opensuse/ruby:2.6 MAINTAINER SUSE Containers Team ENV...

https://github.com/SUSE/Portus/issues/2243#issuecomment-593288139 this works for me setting the PORTUS_BACKGROUND_SYNC_STRATEGY=update-delete in background section of the docker-compose file