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

…and keep copyright / license files (#144)

grafana/rootfs/Dockerfile

@@ -2,18 +2,36 @@ FROM quay.io/deis/base:v0.3.4
 
 COPY . /
 
-RUN apt-get update \
-	&& apt-get install -y libfontconfig \
-	&& curl -sL -o /usr/share/grafana/envtpl https://github.com/arschles/envtpl/releases/download/0.2.3/envtpl_linux_amd64 \
-	&& chmod +x /usr/share/grafana/envtpl \
-	&& curl -so /tmp/grafana.deb https://grafanarel.s3.amazonaws.com/builds/grafana_3.1.0-1468321182_amd64.deb \
-	&& dpkg -i /tmp/grafana.deb \
-	&& rm /tmp/grafana.deb \
-	&& rm /etc/grafana/grafana.ini \
-	&& chmod +x /usr/share/grafana/start-grafana \
-	&& chmod 644 /usr/share/grafana/grafana.ini.tpl \
-	&& apt-get clean \
-	&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/man /usr/share/doc
+RUN apt-get update && \
+	apt-get install -y libfontconfig && \
+	curl -sL -o /usr/share/grafana/envtpl https://github.com/arschles/envtpl/releases/download/0.2.3/envtpl_linux_amd64 && \
+	chmod +x /usr/share/grafana/envtpl && \
+	curl -so /tmp/grafana.deb https://grafanarel.s3.amazonaws.com/builds/grafana_3.1.0-1468321182_amd64.deb && \
+	dpkg -i /tmp/grafana.deb && \
+	rm /tmp/grafana.deb && \
+	rm /etc/grafana/grafana.ini && \
+	chmod +x /usr/share/grafana/start-grafana && \
+	chmod 644 /usr/share/grafana/grafana.ini.tpl && \
+    # cleanup
+    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}"
 
 WORKDIR /usr/share/grafana
 CMD ["./start-grafana"]