Add basic Docker image

Dockerfile

@@ -0,0 +1,23 @@
+FROM node:lts-alpine
+
+RUN mkdir -p /usr/src/app
+
+WORKDIR /usr/src/app
+
+COPY . . 
+
+RUN npm run build
+
+RUN npm install redis@0.8.1 && \
+    npm install pg@4.1.1 && \
+    npm install memcached@2.2.2 && \
+    npm install aws-sdk@2.738.0 && \
+    npm install rethinkdbdash@2.3.31
+
+ENV HOST 0.0.0.0
+
+EXPOSE 7777
+STOPSIGNAL SIGINT
+ENTRYPOINT [ "node", "server.js" ]
+
+CMD ["npm", "start"]