add makefile

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>

base/Dockerfile

@@ -0,0 +1,47 @@
+FROM debian:stretch
+
+LABEL maintainer=az@zok.xyz \
+      version="2.0"
+
+RUN mkdir -p /kopano/repo /kopano/data /kopano/helper
+WORKDIR /kopano/repo
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+# install basics
+# TODO require python3 or python3-minimal?
+RUN apt-get update && \
+    apt-get upgrade -y && \
+    apt-get install --no-install-recommends -y \
+        apt-transport-https \
+        apt-utils \
+        ca-certificates \
+        curl \
+        dumb-init \
+        gpg \
+        jq \
+        locales \
+        moreutils \
+        python3 \
+        && \
+    rm -rf /var/cache/apt /var/lib/apt/lists
+
+RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
+    sed -i -e 's/# de_DE.UTF-8 UTF-8/de_DE.UTF-8 UTF-8/' /etc/locale.gen && \
+    dpkg-reconfigure --frontend=noninteractive locales && \
+    update-locale LANG=en_US.UTF-8
+
+ARG ADDITIONAL_KOPANO_PACKAGES=""
+ARG DOWNLOAD_COMMUNITY_PACKAGES=1
+ARG KOPANO_CORE_REPOSITORY_URL="file:/kopano/repo/core"
+ARG KOPANO_CORE_VERSION=newest
+ARG KOPANO_REPOSITORY_FLAGS="trusted=yes"
+ARG KOPANO_WEBAPP_REPOSITORY_URL="file:/kopano/repo/webapp"
+ARG KOPANO_WEBAPP_VERSION=newest
+ARG RELEASE_KEY_DOWNLOAD=0
+
+# get common utilities
+COPY create-kopano-repo.sh /kopano/helper/
+RUN date +%s > /kopano/buildversion
+
+SHELL [ "/bin/bash", "-c"]