Update Dockerfile to run the server

Dockerfile

@@ -1,2 +1,21 @@
-FROM nginx
-COPY dist /usr/share/nginx/html
+FROM node:10-alpine
+
+# Reduce npm install verbosity, overflows Travis CI log view
+ENV NPM_CONFIG_LOGLEVEL warn
+ENV NODE_ENV production
+
+EXPOSE 8080
+
+RUN mkdir -p /var/infoscreens
+WORKDIR /var/infoscreens
+COPY package.json /var/infoscreens
+COPY server /var/infoscreens/server
+COPY dist /var/infoscreens/dist
+
+# Install NoFlo and dependencies
+RUN npm install --only=production
+
+# Map the volumes
+VOLUME /var/infoscreens/dist
+
+CMD npm start