Changes to improve node dockerfile and to resolve msanand#1

docker-compose.yml

@@ -12,24 +12,18 @@ node1:
         - redis
     ports:
         - "8080"
-    volumes:
-        - node:/src
 node2:
     build: ./node
     links:
         - redis
     ports:
         - "8080"
-    volumes:
-        - node:/src
 node3:
     build: ./node
     links:
         - redis
     ports:
         - "8080"
-    volumes:
-        - node:/src
 redis:
     image: redis
     ports:

node/Dockerfile

@@ -8,9 +8,10 @@ MAINTAINER Anand Mani Sankar
 RUN apt-get update
 
 # Install Node.js and other dependencies
-RUN apt-get -y install curl
-RUN curl -sL https://deb.nodesource.com/setup | sudo bash -
-RUN apt-get -y install python build-essential nodejs
+RUN apt-get update && \
+    apt-get -y install curl && \
+    curl -sL https://deb.nodesource.com/setup | sudo bash - && \
+    apt-get -y install python build-essential nodejs
 
 # Install nodemon
 RUN npm install -g nodemon