* update to Debian Buster
* update webapp container
* update kdav image to buster
* add some debug commands
* use onbuild to specify building of core repository only in one place
* remove ca-certificates and git from kdav image
* git should not be needed since kdav has a builder stage
* ca-certificates is already installed in an earlier stage
* upgrade to Debian 10 for Z-Push
* switch remaining Debian 9 repos in webapp
* use a new major version for the base image
* since its now based on buster
* add new parameters to the onbuild step
* update repos in setup.sh
* switch default distribution in create repo script
* add goss healthcheck to meet
* add goss healthcheck to scheduler
* enhance goss tests for webapp
* add meet and scheduler to make target for goss
* fix healtcheck for webapp
will report 200, but also cause an error because of it being requested over plain
have dedicated url for check
* disable stats reporting in build
* update commander
* add test target for goss
split test-ci up to later add goss to it
* bring back chown of /kopano/data
* use a dedicated goss file for kopano-server
* add todo