adding in improvements from when we ran the birthday party app. Mostly fixed the Dockerfiles so they use Alpine for the base images. That required re-working the Java worker Docker file. Removed links from compose file. cleaned up a few things like a tab instead of a space in app.py

result-app/Dockerfile

@@ -1,9 +1,9 @@
-FROM node:0.10
+FROM mhart/alpine-node
 
-RUN mkdir /app
 WORKDIR /app
 
 ADD package.json /app/package.json
+RUN npm config set registry http://registry.npmjs.org
 RUN npm install && npm ls
 RUN mv /app/node_modules /node_modules