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

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+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"]

base/create-kopano-repo.sh

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+#!/bin/bash
+
+set -eu
+
+function urldecode { : "${*//+/ }"; echo -e "${_//%/\\x}"; }
+
+function version_from_filename {
+    echo "$1" | sed -r 's#[a-z]+-([0-9_.+]+)-.*#\1#'
+}
+
+function h5ai_query {
+    filename=$(curl -s -S -L -d "action=get&items%5Bhref%5D=%2Fcommunity%2F$1%3A%2F&items%5Bwhat%5D=1" -H \
+                "Accept: application/json" https://download.kopano.io/community/ | jq '.items[].href' | \
+                grep 'Debian_9.0-all\|Debian_9.0-amd64' | sed 's#"##g' | sed "s#/community/$1:/##")
+
+    if [ -z "${filename// }" ]; then
+        echo "unknown component"
+        exit 1
+    fi
+
+    filename=$(urldecode "$filename")
+    echo "$filename"
+}
+
+function dl_and_package_community {
+    # take component as first argument and fallback to core if none given
+    component=${1:-core}
+
+    # query community server by h5ai API
+    filename=$(h5ai_query "$component")
+
+    # download & extract packages
+    curl -s -S -L -o "$filename" https://download.kopano.io/community/"$component":/"${filename}"
+    tar xf "$filename"
+
+    # save buildversion
+    currentVersion=$(version_from_filename "$filename")
+    echo "$component-$currentVersion" >> /kopano/buildversion
+
+    # save disk space
+    rm "$filename"
+
+    mv "${filename%.tar.gz}" "$component"
+
+    # prepare directory to be apt source
+    cd "$component"
+    apt-ftparchive packages . | gzip -9c > Packages.gz
+    cd ".."
+}