Moving result app to be based on node:5.11.0-slim, adding back links in docker-compose.yml, and removing explicit container names

docker-compose.yml

@@ -7,6 +7,8 @@ services:
      - ./voting-app:/app
     ports:
       - "5000:80"
+    links:
+      - redis
     networks:
       - front-tier
       - back-tier
@@ -17,25 +19,28 @@ services:
       - ./result-app:/app
     ports:
       - "5001:80"
+    links:
+      - db
     networks:
       - front-tier
       - back-tier
 
   worker:
     build: ./worker
+    links:
+      - db
+      - redis
     networks:
       - back-tier
 
   redis:
     image: redis:alpine
-    container_name: redis
     ports: ["6379"]
     networks:
       - back-tier
 
   db:
     image: postgres:9.4
-    container_name: db
     volumes:
       - "db-data:/var/lib/postgresql/data"
     networks:

result-app/Dockerfile

@@ -1,4 +1,4 @@
-FROM mhart/alpine-node
+FROM node:5.11.0-slim
 
 WORKDIR /app