* have a separate ldap container for demo data
* add question to setup.sh about demo users
* make ldap container switchable
* piggyback small fixup for search failing when starting directly after kopano-server
fixes#53
update Dockerfiles/Makefile for use with kopano supported build
introduce a local ldap image with some demo users
include caddy for reverse proxying
add proper documentation and remove obsolete build and push scripts
Signed-off-by: Felix Bartels <felix@host-consultants.de>