fix Dockerfile

Dockerfile

@@ -3,8 +3,9 @@ RUN mkdir /peer-server
 WORKDIR /peer-server
 COPY package.json .
 COPY src ./src
+COPY config ./config
 COPY app.json .
 RUN npm install
 EXPOSE 9000
-ENTRYPOINT ["node", "index.js"]
+ENTRYPOINT ["node", "./src/index.js"]
 CMD [ "--port", "9000" ]