Set Up Nginx as a Reverse Proxy for Docker

We will use Nginx to route each subdomain to a different container on the same server.

Nginx configuration

server {
    listen 80;
    server_name app.example.com;
    location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $remote_addr;
    }
}

Reload

sudo nginx -t
sudo systemctl reload nginx