Use Node.js and Express.js application with Nginx on a VM using GitHub project To deployment

1. Prepare VM

Update and install necessary packages:

sudo apt update && sudo apt upgrade -y
sudo apt install git nodejs npm nginx -y

Verify Node.js and npm installation:
- ```
node -v
npm -v
```
Install a process manager like PM2:
- ```
sudo npm install -g pm2
```

2. Clone and Set Up Project

Navigate to the desired directory:
- ```
cd /var/www
```

Clone your project repository:

git clone https://github.com/RosCheath/rupp-e-card.git
cd rupp-e-card

Install dependencies:
- ```
npm install
```

Run the app with PM2:

cd src
pm2 start app.js --name rupp-e-card
pm2 save
pm2 startup

3. Configure Nginx as a Reverse Proxy

Create an Nginx configuration file for domain:

sudo nano /etc/nginx/sites-available/verify.rupp.edu.kh

Add the following content:

server {
    server_name verify.rupp.edu.kh;

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    listen 80;
}

Enable the configuration:

sudo ln -s /etc/nginx/sites-available/verify.rupp.edu.kh /etc/nginx/sites-enabled/

Test Nginx configuration:
- ```
sudo nginx -t
```
Reload Nginx:
- ```
sudo systemctl reload nginx
```