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

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

    # Allow metrics.json to be fetched by the dashboard
    location = /metrics.json {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Access-Control-Allow-Origin "*";
    }

    # Health check endpoint
    location /health {
        access_log off;
        return 200 'OK';
        add_header Content-Type text/plain;
    }
}