server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html /viewer/index.html;

    # Enable gzip compression for CAD models, netlists & JSON catalogs
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;

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

    # Cache static CAD assets and JSON catalogs
    location ~* \.(json|dxf|scad|csv|stl|obj)$ {
        expires 1d;
        add_header Cache-Control "public, no-transform";
        add_header Access-Control-Allow-Origin "*";
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}