break out compose and docker files for compile vs no-compile options

dockerfiles/monerod_exporter

@@ -0,0 +1,11 @@
+FROM node:8
+
+WORKDIR /opt/monerod_exporter
+
+RUN git clone https://github.com/ExcitableAardvark/monerod_exporter.git --branch=master --depth=1 .
+
+RUN npm install
+
+EXPOSE 8080
+
+ENTRYPOINT ["node", "index.js"]