Nginx

nginx-http.conf

http {
    ...
    server {
        listen 80;
        server_name example.com;
        
        # Proxy requests to Program A (port 3000)
        location /PAA {
            root "C:/D/AppHost/web/build/";
            proxy_pass http://localhost: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;
        }

        # Proxy requests to Program B (port 4000)
        location /PAB {
            root "C:/D/AppHost/web/build/";
            proxy_pass http://localhost:4000;
            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;
        }
        
        # DEFAULT
        location / {
            proxy_pass http://localhost: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;
        }

        location /api {
            proxy_pass http://localhost:3000/api;
            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;
        }

        location /_next/static {
            alias /path/to/nextjs-app/.next/static;
        }

        location /_next/image {
            proxy_pass http://localhost:3000/_next/image;
            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;
        }

        # CORS configuration
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, Accept';
        add_header 'Access-Control-Expose-Headers' 'Content-Type, Authorization, Accept';
        add_header 'Access-Control-Allow-Credentials' 'true';
    }
}