Update dockerfile a bit

docker-compose.yml

@@ -6,14 +6,14 @@ services:
       - "27017:27017"
 
   viewer:
-    #image: ohifviewer:latest
-    build: .
+    image: ohif/viewer:latest
     ports:
       - "3000:3000"
     links:
       - mongo
-    env_file: dockersupport/ohifviewer.env # TODO: Doesn't look like METEOR Settings are being used properly?
     environment:
       - MONGO_URL=mongodb://mongo:27017/ohif
     extra_hosts:
-      - "localpacs:192.168.1.11"
+      - "pacsIP:192.168.1.11"
+    volumes:
+      - /opt/docker/ohif-viewer/app.json:/app/app.json