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

    # AudioWorkletProcessor needs the worklet served as a real JS module.
    types {
        application/javascript js;
        text/html              html;
        text/css               css;
        image/svg+xml          svg;
    }

    # Static index — short cache so updates land quickly after a redeploy.
    location = / {
        try_files /index.html =404;
        add_header Cache-Control "no-cache, must-revalidate";
    }
    location = /index.html {
        add_header Cache-Control "no-cache, must-revalidate";
    }

    # Worklet: revalidate on every load (it changes whenever we touch the engine).
    location = /worklet.js {
        add_header Cache-Control "no-cache, must-revalidate";
    }

    # Everything else (sandbox/, future static assets) gets a moderate cache.
    location / {
        try_files $uri $uri/ =404;
        add_header Cache-Control "public, max-age=300";
    }

    # Gzip the text payloads.
    gzip on;
    gzip_types text/plain text/css application/javascript application/json image/svg+xml;
    gzip_min_length 256;
}