1) First setup Nginx on Ubuntu

https://anandparmar.hashnode.dev/install-nginx-in-aws-ubuntu-2004

2) Install Node in Server

• First install Node Version Manager

    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash
  
    export NVM_DIR="$HOME/.nvm"
    [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
    [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"
  

• Check Node Version Manager version

    nvm --version
  

• Install Node ( This will install the latest version of node & npm )

    nvm install node
  
    node -v # check node version
    npm -v  # check npm version
  

• Note:- Default nvm will install latest node version but suppose you want specific node version then only run this command

    nvm install 17.9.1
  
    node -v  # check node version
    npm -v   # check npm version
  

3) Setup NestJS

• Install package nestjs/cli in global

    npm i -g @nestjs/cli
  

• Create NestJS app

    cd /var/
    sudo mkdir nest-project
    sudo chmod -R 777 nest-project
    cd nest-project
    nest new .
  

• Configure NGINX Reverse Proxy
  Note: Default NestJS app is running on 3000 port so we have to setup reverse proxy that port to 80 port

    sudo nano /etc/nginx/sites-enabled/default
  

  Update default file of nginx

    server {
            listen 80 default_server;
            listen [::]:80 default_server;
  
            # SSL configuration
            #
            # listen 443 ssl default_server;
            # listen [::]:443 ssl default_server;
  
            root /var/www/html;
  
            # Add index.php to the list if you are using PHP
            index index.html index.htm index.nginx-debian.html;
  
            server_name _;
  
            #Reverse proxy for accessing Nest app
            location / {
                    proxy_pass http://127.0.0.1:3000;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header X-Forwarded-Proto $scheme;
            }
  
    }
  

• Restart nginx for reflecting changes

    sudo systemctl restart nginx
  

4) Configure PM2

Note:- PM2 is a daemon process manager that will help you manage and keep your application online 24/7

cd /var/nest-project

#Build the NestJS app, This command we have to run every time when code is change
npm run build

# Install pm2
npm install pm2 -g

#pm2 start
pm2 start npm --name "app" -- start

#pm2 restart, This command  we have to run every time when code is change
pm2 restart app

# Others command for pm2
pm2 list         # get list of all pm2 app
pm2 log          # get the log of pm2 app
pm2 delete app   # delete specific pm2 appname=app