chore(Dockerfile): cleanup after installation a bit more than before …

…and keep copyright / license files (#67)

rootfs/Dockerfile

@@ -2,27 +2,40 @@ FROM quay.io/deis/base:v0.3.4
 
 COPY . /
 
-RUN apt-get update \
-	&& apt-get install -y \
-		git \
-		golang \
-		make \
-		--no-install-recommends \
-	&& export DOCKER_REGISTRY_TAG=deis \
-		DOCKER_REGISTRY_REPO=https://github.com/deis/distribution.git \
-		DISTRIBUTION_DIR=/go/src/github.com/docker/distribution \
-	&& export GOPATH=/go:$DISTRIBUTION_DIR/Godeps/_workspace \
-	&& git clone -b $DOCKER_REGISTRY_TAG --single-branch $DOCKER_REGISTRY_REPO $DISTRIBUTION_DIR \
-	&& cd $DISTRIBUTION_DIR \
-	&& make binaries \
-	&& cp bin/* /bin/ \
-	&& rm -rf /go \
-	&& apt-get remove -y --auto-remove --purge \
-		git \
-		golang \
-		make \
-	&& apt-get clean \
-	&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/man /usr/share/doc
+RUN buildDeps='git golang make'; \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+        $buildDeps && \
+	export DOCKER_REGISTRY_TAG=deis \
+		   DOCKER_REGISTRY_REPO=https://github.com/deis/distribution.git \
+		   DISTRIBUTION_DIR=/go/src/github.com/docker/distribution && \
+	export GOPATH=/go:$DISTRIBUTION_DIR/Godeps/_workspace && \
+	git clone -b $DOCKER_REGISTRY_TAG --single-branch $DOCKER_REGISTRY_REPO $DISTRIBUTION_DIR && \
+	cd $DISTRIBUTION_DIR && \
+	make binaries && \
+	cp bin/* /bin/ && \
+	rm -rf /go && \
+    # 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}"
 
 VOLUME ["/var/lib/registry"]
 CMD ["/opt/registry/sbin/registry"]