while it did not work out to depend in the health status of mysql for the start of kopano-server, its nevertheless an interesting value. since the dockerfile does not include an automatic healcheak, add it to the compose file.
Signed-off-by: Felix Bartels <felix@host-consultants.de>
add example docker-compose (for easy copy and paste)
refactor common multi stage image to base image for core and webapp
add docker version tagging
add a version to the base image as well
Signed-off-by: Felix Bartels <felix@host-consultants.de>
