Fixed docker build (#349)

* Fixed docker build

* Added --paper according to github comments

Author: Froelund

Dockerfile

@@ -1,6 +1,11 @@
 FROM node:latest
 
-ADD . /app
+RUN mkdir -p /app
 WORKDIR /app
 
+COPY package.json /app/
 RUN npm install
+
+COPY . /app
+
+CMD [ "./zenbot.sh", "trade", "--paper" ]

docker-compose.yml

@@ -1,8 +1,7 @@
 server:
   build: .
   volumes:
-    - .:/app
-    - /app/node_modules
+    - ./conf.js:/app/conf.js
   links:
     - mongodb
   command: ./zenbot.sh trade --paper