small updates

just to be able to get it to un on a mac

Author: Kelly

.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+.git

Dockerfile

@@ -3,9 +3,10 @@ FROM node:8.11.2
 LABEL app="redis-manager" version="1.0"
 
 WORKDIR /opt/app
-COPY . .
-
+# install and cache app dependencies
+COPY package.json /opt/app/package.json
 RUN npm install
+COPY . .
 
 EXPOSE 3003
-CMD ["npm", "start"]
+CMD ["npm", "run", "start"]