# Static file serving for "Why is the DLR shut today?".
# Intended to run behind an external reverse proxy (e.g. NGINX) which
# handles TLS, host routing and any X-Forwarded-* headers.

server {
    listen       8080;
    listen       [::]:8080;
    server_name  _;

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

    gzip            on;
    gzip_vary       on;
    gzip_types      text/css application/javascript;

    location / {
        try_files $uri $uri/ =404;
    }

    # HTML should always be revalidated so deploys are picked up promptly.
    location = /index.html {
        add_header Cache-Control "no-cache";
    }

    # The message list is edited frequently; do not cache it.
    location = /messages.js {
        add_header Cache-Control "no-cache";
    }

    # Other static assets may be cached for a short period.
    location ~* \.(?:css|js)$ {
        add_header Cache-Control "public, max-age=3600";
    }

    # Health endpoint for the proxy / orchestrator.
    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 "ok\n";
    }
}