Following are the steps to install Visionhelpdesk’s Livechat on Linux server:

1. Install nodejs [version 12.x]

2. Install npm [vesion 6.x]

3. Install pm2 [version 3.5.x]
   

   curl -sL https://rpm.nodesource.com/setup_12.x | bash -
   yum -y install nodejs
   yum install gcc-c++ make
   npm install pm2@latest -g

4. Copy server.js, router.js and package.json on root or /

5. Go to the path where package.json is copied

6. Execute the command 
   

   npm install

7. Set the reverse proxy as below
   

       <Location /chat >
            ProxyPass http://127.0.0.1:3000
            ProxyPassReverse http://127.0.0.1:3000
       </Location>

8. Set the SSL
9. Start the server using the below command

#pm2 start server.js

Note: If port 3000 is already in use then need to create .env file at the same location where server.js is stored and put the port as below in that file:

PORT=3001
virtualDirPath=''

Also, make the changes in reverse proxy accordingly.