Update Dockerfile

Dockerfile

-### STAGE 1: Build ###
+# Create image based on the official Node 6 image from dockerhub
+FROM node:6
 
-# We label our stage as 'builder'
-FROM node:9-alpine as builder
+# Create a directory where our app will be placed
+RUN mkdir -p /usr/src/app
 
-COPY package.json package-lock.json ./
+# Change directory so that our commands run inside this new directory
+WORKDIR /usr/src/app
 
-RUN npm set progress=false && npm config set depth 0 && npm cache clean --force
+# Copy dependency definitions
+COPY package.json /usr/src/app
 
-## Storing node modules on a separate layer will prevent unnecessary npm installs at each build
-RUN npm i && mkdir /ng-app && cp -R ./node_modules ./ng-app
+# Install dependecies
+RUN npm install
 
-WORKDIR /ng-app
+# Get all the code needed to run the app
+COPY . /usr/src/app
 
-COPY . .
+# Expose the port the app runs in
+EXPOSE 4200
 
-## Build the angular app in production mode and store the artifacts in dist folder
-RUN $(npm bin)/ng build --prod
-
-
-### STAGE 2: Setup ###
-
-FROM nginx:1.13.3-alpine
-
-## Copy our default nginx config
-COPY nginx/default.conf /etc/nginx/conf.d/
-
-## Remove default nginx website
-RUN rm -rf /usr/share/nginx/html/*
-
-## From 'builder' stage copy over the artifacts in dist folder to default nginx public folder
-COPY --from=builder /ng-app/dist /usr/share/nginx/html
-
-CMD ["nginx", "-g", "daemon off;"]
+# Serve the app
+CMD ["npm", "start"]