Update grafana build to use alpine

The upstream grafana image switched over to using alpine instead of
ubuntu as the container image. This commit fixes issues with the alpine
docker build to ensure it works with alpine.

Author: Jarret Lavallee

grafana-puppetserver/Dockerfile

@@ -5,11 +5,7 @@ USER root
 USER root
 
 COPY build/* /grafana-puppet/
-RUN apt-get update && \
-    apt-get -y install curl && \
-    apt-get -y autoremove && \
-    apt-get -y clean && \
-    rm -rf /var/lib/apt/lists/* && \
+RUN apk add curl && \
     rm -rf /tmp/*
 
 USER grafana
@@ -19,7 +15,7 @@ ENTRYPOINT /grafana-puppet/run.sh
 LABEL org.label-schema.vendor="Reid Vandewiele" \
       org.label-schema.name="Grafana Puppetserver Dashboard" \
       org.label-schema.description="Grafana running a dashboard to display puppetserver metrics captured using npwalker/pe_metric_curl_cron_jobs" \
-      org.label-schema.version="1.7.1" \
+      org.label-schema.version="1.8.0" \
       org.label-schema.vcs-url="https://github.com/puppetlabs/puppet-metrics-viewer" \
       org.label-schema.build-date="2017-05-26" \
       org.label-schema.docker.schema-version="1.0"