added apache2 and ssl config

postfix/Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3-labs
+# syntax=docker/dockerfile:1
 FROM alpine:latest
 # install apt packages
 ENV TZ Europe/Berlin 
@@ -9,10 +9,8 @@ ADD https://github.com/just-containers/s6-overlay/releases/download/v3.1.1.2/s6-
 RUN <<EOF 
 tar -C / -Jxpf /tmp/s6-overlay-noarch.tar.xz
 tar -C / -Jxpf /tmp/s6-overlay-x86_64.tar.xz
-rm /tmp/s6-overlay*.tar.xz
 EOF
 COPY ./etc/s6-overlay /etc/s6-overlay
-COPY ./etc/postfix /etc/postfix
 # install kopano core
 WORKDIR /root
 EXPOSE 25