server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;
    charset utf-8;
    server_tokens off;

    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    gzip on;
    gzip_min_length 1024;
    gzip_types text/css application/javascript application/json image/svg+xml;

    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 "ok\n";
    }

    location = / {
        return 302 /admin/;
    }

    location = /admin {
        return 301 /admin/;
    }

    location = /admin/index.html {
        expires -1;
        try_files $uri =404;
    }

    location /admin/assets/ {
        expires 1y;
        try_files $uri =404;
    }

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