added kopano & postifx configuration files

kopano.dockerfile

@@ -0,0 +1,18 @@
+# FROM ubuntu:20.04
+FROM tozd/runit:ubuntu-focal
+# declaration section
+ARG MAIL_DOMAIN=zntrl.de
+EXPOSE 80 2003
+# build section
+RUN apt update -y
+RUN DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin apt-get install -y tzdata
+# kopano
+WORKDIR /root
+COPY dist/core-11.0.2.50.507cbae-Ubuntu_20.04-amd64.tar.gz .
+COPY dist/webapp-6.0.0.57.1049268-Ubuntu_20.04-all.tar.gz .
+COPY deploy-kopano.sh .
+RUN ./deploy-kopano.sh
+# https://documentation.kopano.io/kopanocore_administrator_manual/configure_kc_components.html#configure-kopano-dagent-for-delivery-via-unix-socket
+# create run scripts in etc/service
+COPY ./etc etc
+# CMD ["/usr/sbin/kopano-server", "-F", "-c", "/etc/kopano/server.cfg"]