server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    # Use Docker's embedded DNS resolver; defer resolution to request time
    resolver 127.0.0.11 valid=30s;

    location /api/ {
        set $api_upstream http://api:3000;
        proxy_pass $api_upstream;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location / {
        try_files $uri $uri/ /index.html;
    }
}