chore(Dockerfile): cleanup after installation a bit more than before and keep copyright / license files (#96)

Brings the Dockerfile in line with Controller, makes it easier to move to Python 3

Author: helgi

rootfs/Dockerfile

@@ -1,27 +1,35 @@
 FROM quay.io/deis/base:v0.3.4
 
-RUN apt-get update \
-	&& apt-get install -y \
-		gcc \
-		libffi6 \
-		libffi-dev \
-		libssl1.0.0 \
-		libssl-dev \
-		musl \
-		musl-dev \
-		python \
-		python-dev \
-		--no-install-recommends \
-	&& curl -sSL https://bootstrap.pypa.io/get-pip.py | python - pip==8.1.2 \
-	&& pip install --disable-pip-version-check --no-cache-dir docker-py==1.10.3 \
-	&& apt-get remove -y --auto-remove --purge \
-		gcc \
-		libffi-dev \
-		libssl-dev \
-		musl-dev \
-		python-dev \
-	&& apt-get clean \
-	&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/man /usr/share/doc
+RUN buildDeps='gcc git libffi-dev libssl-dev musl-dev python-dev python-pip python-wheel python-setuptools'; \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+        $buildDeps \
+        libffi6 \
+        libssl1.0.0 \
+        musl \
+        python && \
+	pip install --disable-pip-version-check --no-cache-dir docker-py==1.10.3 && \
+    # cleanup
+    apt-get purge -y --auto-remove $buildDeps && \
+    apt-get autoremove -y && \
+    apt-get clean -y && \
+    # package up license files if any by appending to existing tar
+    COPYRIGHT_TAR='/usr/share/copyrights.tar'; \
+    gunzip $COPYRIGHT_TAR.gz; tar -rf $COPYRIGHT_TAR /usr/share/doc/*/copyright; gzip $COPYRIGHT_TAR && \
+    rm -rf \
+        /usr/share/doc \
+        /usr/share/man \
+        /usr/share/info \
+        /usr/share/locale \
+        /var/lib/apt/lists/* \
+        /var/log/* \
+        /var/cache/debconf/* \
+        /etc/systemd \
+        /lib/lsb \
+        /lib/udev \
+        /usr/lib/x86_64-linux-gnu/gconv/IBM* \
+        /usr/lib/x86_64-linux-gnu/gconv/EBC* && \
+    bash -c "mkdir -p /usr/share/man/man{1..8}"
 
 ADD https://storage.googleapis.com/object-storage-cli/bb8e054/objstorage-bb8e054-linux-amd64 /bin/objstorage
 RUN chmod +x /bin/objstorage