🌐 How to Host Multiple Projects on One VPS Using Subdomains (admin-abhinav.rohatech.site)

🌐 How to Host Multiple Projects on One VPS Using Subdomains (Nginx + PM2)

Already running one app on your VPS and want to host another under a different subdomain like admin-abhinav.rohatech.site? Whether it's a second Next.js project or any Node.js app, this guide will walk you through adding multiple subdomain apps on a single server using Nginx and PM2.

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🔧 Step 1: Add DNS Record in GoDaddy

1. Log in to GoDaddy.
2. Go to the DNS settings for your domain rohatech.site.
3. Click Add Record.

Add the following DNS record:

Type	Name	Value	TTL
A	admin-abhinav	Your VPS IP address	1 Hour

This connects admin-abhinav.rohatech.site to your VPS.

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📁 Step 2: Upload or Clone Your Second App

SSH into your VPS and place your second app in a new directory:

ssh root@your-vps-ip
cd /var/www
git clone https://github.com/your-second-app.git admin-app
cd admin-app
npm install
npm run build

Alternatively, upload the project using scp or FTP if you're working locally.

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⚙️ Step 3: Run the Second App on a Different Port

Use PORT=3002 to avoid conflict with other apps, and manage it using PM2:

PORT=3002 pm2 start npm --name "admin-app" -- start
pm2 save

This keeps the app running in the background and ensures it restarts on reboot.

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🌐 Step 4: Configure Nginx for the New Subdomain

Create a new Nginx config file for admin-abhinav.rohatech.site:

nano /etc/nginx/conf.d/admin-abhinav.rohatech.site.conf

Paste this:

server {
    listen 80;
    server_name admin-abhinav.rohatech.site;

    location / {
        proxy_pass http://localhost:3002;
        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;
    }
}

Save the file and restart Nginx:

nginx -t
systemctl reload nginx

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🔒 Step 5: Add SSL with Certbot

Use Let’s Encrypt to secure the subdomain with HTTPS:

certbot --nginx -d admin-abhinav.rohatech.site

Certbot will configure your Nginx file automatically and apply SSL.

Optional: Force Redirect HTTP to HTTPS

Add this block in Nginx for auto-redirect:

server {
    listen 80;
    server_name admin-abhinav.rohatech.site;
    return 301 https://$host$request_uri;
}

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✅ Your Second App is Now Live!

You can now access your second app via:

https://admin-abhinav.rohatech.site

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💡 Bonus Tips

• Use pm2 list to see all running apps.
• Check logs with pm2 logs admin-app.
• To remove an app: pm2 delete admin-app
• Set all apps to run on boot: pm2 startup then follow the instructions

Now you can run multiple apps on different subdomains — clean, secure, and scalable! 🚀