Add Kopano Meet and depending instrastructure to meet

Makefile adjustments
reorder Makefile
adds image for kwmserver
adds image for meet
add Meet to compose
clean up proxy configuration
move kcconf.py into the base image

meet/start-service.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+ADDITIONAL_KOPANO_PACKAGES=${ADDITIONAL_KOPANO_PACKAGES:-""}
+
+set -eu # unset variables are errors & non-zero return values exit the whole script
+
+if [ ! -e /kopano/$SERVICE_TO_START.py ]; then
+	echo "Invalid service specified: $SERVICE_TO_START" | ts
+	exit 1
+fi
+
+echo "Configure service '$SERVICE_TO_START'" | ts
+/usr/bin/python3 /kopano/$SERVICE_TO_START.py
+
+# allow helper commands given by "docker-compose run"
+if [ $# -gt 0 ]; then
+	exec "$@"
+	exit
+fi
+
+sed -i s/\ *=\ */=/g /etc/kopano/kwebd.cfg
+export $(grep -v '^#' /etc/kopano/kwebd.cfg | xargs -d '\n')
+# cleaning up env variables
+unset "${!KCCONF_@}"
+exec kopano-kwebd serve
+