switched to slim/alpine images

.gitignore

@@ -0,0 +1 @@
+docker-compose-test.yml

Dockerfile.elasticsearch

@@ -1,4 +1,4 @@
-FROM elasticsearch
+FROM elasticsearch:alpine
 MAINTAINER Zammad <info@zammad.org>
 ARG BUILD_DATE
 

Dockerfile.nginx

@@ -1,4 +1,4 @@
-FROM nginx
+FROM nginx:alpine
 MAINTAINER Zammad <info@zammad.org>
 ARG BUILD_DATE
 

Dockerfile.postgresql

@@ -1,4 +1,4 @@
-FROM postgres
+FROM postgres:alpine
 MAINTAINER Zammad <info@zammad.org>
 ARG BUILD_DATE
 

Dockerfile.zammad

@@ -1,4 +1,4 @@
-FROM ruby:2.3.1
+FROM ruby:2.3.1-slim
 MAINTAINER Zammad <info@zammad.org>
 ARG BUILD_DATE
 
@@ -23,10 +23,18 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
 EXPOSE 3000
 EXPOSE 6042
 
+# install dependencies
+RUN apt-get update && apt-get install -y build-essential git-core libpq5 libpq-dev
+
 # install zammad
 COPY install-zammad.sh /tmp
 RUN chmod +x /tmp/install-zammad.sh;/bin/bash -l -c /tmp/install-zammad.sh
 
+# cleanup
+RUN apt-get remove --purge -y git-core build-essential bzip2 ca-certificates libffi-dev libgdbm3 libssl-dev procps zlib1g-dev && \
+    apt-get autoremove -y && \
+    rm -rf /var/lib/apt/lists/*
+
 # docker init
 COPY docker-entrypoint.sh /
 RUN chown zammad:zammad /docker-entrypoint.sh;chmod +x /docker-entrypoint.sh

hooks/config

@@ -3,5 +3,4 @@
 # build hooks config
 #
 
-DOCKER_REPO="zammad/zammad-docker-compose"
 DOCKER_IMAGES="elasticsearch nginx postgresql zammad"