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deployment_workflow.md

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Deployment Workflow for Web Application to VPS

1. Prepare the Application

  • Ensure all dependencies are installed: 
    npm install
  • Build the application for production: 
    npm run build

2. Set Up the VPS

  • Connect to the VPS: 
    ssh user@your_vps_ip
  • Update the package manager: 
    sudo apt update && sudo apt upgrade -y
  • Install Node.js and npm: 
    curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
sudo apt install -y nodejs
  • Install Nginx: 
    sudo apt install -y nginx

3. Deploy the Application

  • Transfer application files to the VPS (using SCP or any other method): 
    scp -r . user@your_vps_ip:/path/to/your/app
  • Navigate to the application directory: 
    cd /path/to/your/app
  • Install production dependencies: 
    npm install --production

4. Configure the Web Server

  • Create a new Nginx configuration file: 
    sudo nano /etc/nginx/sites-available/your_app
  • Add the following configuration: 
    server {
    listen 80;
    server_name your_domain_or_ip;

    location / {
        proxy_pass http://localhost:3000; # Adjust the port if necessary
        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;
    }
}
  • Enable the configuration: 
    sudo ln -s /etc/nginx/sites-available/your_app /etc/nginx/sites-enabled/
  • Test the Nginx configuration: 
    sudo nginx -t
  • Restart Nginx: 
    sudo systemctl restart nginx

5. Set Up Environment Variables

  • Create a .env file in the application directory and add necessary environment variables.

6. Start the Application

  • Use a process manager like PM2 to run the application: 
    npm install -g pm2
pm2 start npm --name "your_app_name" -- run start
pm2 startup
pm2 save

7. Testing

  • Open your browser and navigate to http://your_domain_or_ip to verify that the application is running correctly.

Notes

  • Ensure that your firewall allows traffic on port 80 (HTTP) and 443 (HTTPS if using SSL).
  • Consider setting up SSL using Let's Encrypt for secure connections.