some Dockerfile tidying and using variables for package versions

Dockerfile

@@ -9,6 +9,10 @@ LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DA
 # environment settings
 ARG DEBIAN_FRONTEND="noninteractive"
 
+# package versions
+ARG GRAFANA_VER="4.1.2-1486989747"
+ARG INFLUX_VER="1.2.0"
+
 # build packages as variable
 ARG BUILD_PACKAGES="\
 	apt-transport-https \
@@ -18,6 +22,8 @@ ARG BUILD_PACKAGES="\
 	cpp-5 \
 	dh-python \
 	distro-info-data \
+	fontconfig-config \
+	fonts-dejavu-core \
 	g++ \
 	g++-5 \
 	gcc \
@@ -28,18 +34,22 @@ ARG BUILD_PACKAGES="\
 	icu-devtools \
 	libasan2 \
 	libatomic1 \
-	libc-dev-bin \
 	libc6-dev \
 	libcc1-0 \
+	libc-dev-bin \
 	libcilkrts5 \
 	liberror-perl \
+	libexpat1 \
+	libfontconfig \
+	libfontconfig1 \
+	libfreetype6 \
 	libgcc-5-dev \
 	libgdbm3 \
 	libgmp-dev \
 	libgmpxx4ldbl \
 	libgomp1 \
-	libicu-dev \
 	libicu55 \
+	libicu-dev \
 	libisl15 \
 	libitm1 \
 	liblsan0 \
@@ -49,9 +59,10 @@ ARG BUILD_PACKAGES="\
 	libmpx0 \
 	libperl5.22 \
 	libpng12-0 \
-	libpython3-stdlib \
+	libpng12-0 \
 	libpython3.5-minimal \
 	libpython3.5-stdlib \
+	libpython3-stdlib \
 	libquadmath0 \
 	libruby2.3 \
 	libstdc++-5-dev \
@@ -69,8 +80,8 @@ ARG BUILD_PACKAGES="\
 	libxml2 \
 	libxml2-dev \
 	libxrender1 \
-	libxslt1-dev \
 	libxslt1.1 \
+	libxslt1-dev \
 	libxss1 \
 	libyaml-0-2 \
 	linux-libc-dev \
@@ -80,35 +91,28 @@ ARG BUILD_PACKAGES="\
 	perl \
 	perl-modules-5.22 \
 	python3 \
-	python3-minimal \
 	python3.5 \
 	python3.5-minimal \
+	python3-minimal \
 	rake \
 	ri \
 	ruby \
-	ruby-dev \
-	ruby-did-you-mean \
-	ruby-full \
-	ruby-minitest \
-	ruby-net-telnet \
-	ruby-power-assert \
-	ruby-test-unit \
 	ruby2.3 \
 	ruby2.3-dev \
 	ruby2.3-doc \
 	ruby2.3-tcltk \
+	ruby-dev \
+	ruby-did-you-mean \
+	ruby-full \
 	rubygems-integration \
+	ruby-minitest \
+	ruby-net-telnet \
+	ruby-power-assert \
+	ruby-test-unit \
+	ucf \
 	wget \
 	x11-common \
-	zlib1g-dev \
-	fontconfig-config \
-	fonts-dejavu-core \
-	libexpat1 \
-	libfontconfig1 \
-	libfontconfig \
-	libfreetype6 \
-	libpng12-0 \
-	ucf"
+	zlib1g-dev"
 
 # copy app and excludes
 COPY root/ /
@@ -121,10 +125,8 @@ RUN \
 	--no-install-recommends \
 	$BUILD_PACKAGES && \
 
-
-
 # install ruby app gems
-cd /opt/dockerhub-stats/ && \
+ cd /opt/dockerhub-stats/ && \
  echo 'gem: --no-document' > \
 	/etc/gemrc && \
  gem install bundler && \
@@ -142,26 +144,30 @@ cd /opt/dockerhub-stats/ && \
 	libfreetype6 \
 	libpng12-0 \
 	netcat \
-	wget \
-	ruby && \
+	ruby \
+	wget && \
 
- cd /tmp; wget https://dl.influxdata.com/influxdb/releases/influxdb_1.2.0_amd64.deb; dpkg -i influxdb_1.2.0_amd64.deb && \
- cd /tmp; wget https://grafanarel.s3.amazonaws.com/builds/grafana_4.1.2-1486989747_amd64.deb; dpkg -i grafana_4.1.2-1486989747_amd64.deb && apt-get -f install && \
+ # install influxdb and grafana
+ curl -o \
+ /tmp/influxdb.deb \
+	"https://dl.influxdata.com/influxdb/releases/influxdb_${INFLUX_VER}_amd64.deb" && \
+ dpkg -i /tmp/influxdb.deb && \
+ curl -o \
+ /tmp/grafana.deb \
+	"https://grafanarel.s3.amazonaws.com/builds/grafana_${GRAFANA_VER}_amd64.deb" && \
+ dpkg -i /tmp/grafana.deb && \
+ apt-get -f install && \
 
+# clean up
  rm -rf \
+	/root \
 	/tmp/* \
 	/var/lib/apt/lists/* \
 	/var/tmp/* && \
- find /root -name . -o -prune -exec rm -rf -- {} + && \
- find /var/lib/gems -name "cache" -type d -exec rm -rf -- {} + && \
  mkdir -p \
 	/root && \
-chmod 744 /etc/cron.d/dockerhub-stats
-
-# import grafana dashboard
-# ADD ./grafana/dash.json /var/lib/grafana/dashboards/dash.json
+ chmod 744 /etc/cron.d/dockerhub-stats
 
 # ports and volumes
-#WORKDIR /opt/docker-readme-sync
 EXPOSE 3000 8083 8086
 VOLUME /config