linux setup steps update

linux_setup_el.sh

 sudo yum install npm
 
 
+sudo firewall-cmd --zone=public --add-port=8081/tcp --permanent
+sudo firewall-cmd --reload
+
+
 #INSTALLING NODE JS
-npm install -g pm2
+sudo npm install -g pm2
 npm install -g ember-cli
 npm install -g loopback-cli
 
 git pull origin master 
 rm -rf package-lock.json
 npm i --force
-bower install
+sudo bower install
 node_modules/.bin/bower install
 
 cd ..