fix(docker) - Updated Dockerfile production (#1523)

Dockerfile-production

@@ -61,18 +61,18 @@ WORKDIR /opt/mean.js
 # and install node_modules/ everytime we build the docker, but only
 # when the local package.json file changes.
 # Install npm packages
-ADD package.json /opt/mean.js/package.json
+COPY package.json /opt/mean.js/package.json
 RUN NODE_ENV=development npm install --quiet && npm cache clean
 
 # Install bower packages
-ADD bower.json /opt/mean.js/bower.json
-ADD .bowerrc /opt/mean.js/.bowerrc
+COPY bower.json /opt/mean.js/bower.json
+COPY .bowerrc /opt/mean.js/.bowerrc
 RUN bower install --quiet --allow-root --config.interactive=false
 
 # Set development environment as default
 ENV NODE_ENV production
 
-ADD . /opt/mean.js
+COPY . /opt/mean.js
 
 # Run MEAN.JS server
-CMD ["npm","run-script","start:prod"]
+CMD ["npm","run-script","start:prod"]