How to install Rocketchat in CentOS 7

Rocketchat is an opensource chat application

Need fresh updated centos 7

#yum install epel-release -y
#yum update -y

after successfull updates install mango DB

#vi /etc/yum.repos.d/mongodb-org-3.2.repo
[mongodb-org-3.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc

save and exit :wq!

#yum install mongodb-org mongodb-org-server -y

install npm node
#yum install nodejs curl GraphicsMagick npm -y
#npm install -g inherits n
#n 0.10.40
// if npm command not found centos
#yum -y install nodejs npm

after successfull instalation of nodejs , need to install rocketchat

#cd /opt
#ls
.
#curl -L https://rocket.chat/releases/latest/download -o rocket.chat.tgz
#tar -zxvf rocket.chat.tgz
#mv bundle Rocket.Chat
#cd Rocket.Chat/programs/server
#npm install

#vi /usr/lib/systemd/system/rocketchat.service   //create a service
[Unit]
Description=The Rocket.Chat server
After=network.target remote-fs.target nss-lookup.target nginx.target mongod.target
[Service]
ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.js
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=rocketchat
User=root
Environment=MONGO_URL=mongodb://localhost:27017/rocketchat ROOT_URL=http://www.example.com:3000/ PORT=3000
[Install]
WantedBy=multi-user.target

save and exit :wq!

now stat the following services

#systemctl start mongod.service
#systemctl enable mongod.service  

#systemctl start rocketchat.service
#systemctl enable rocketchat.service

if you have enabled your firewall then put the following rules in your iptables

#firewall-cmd --zone=public --permanent --add-port=3000/tcp
#firewall-cmd --reload

else
just check wheter firewall was disabled

now check your browser

http://localhost:3000