nginx-proxy-manager-zh/backend/templates/_hsts_map.conf

map $scheme $hsts_header {
    https   "max-age=63072000;{% if hsts_subdomains == 1 or hsts_subdomains == true -%} includeSubDomains;{% endif %} preload";
}
only add hsts header with https. fixes https://github.com/NginxProxyManager/nginx-proxy-manager/issues/1005 for more information look at: https://websistent.com/add-the-hsts-header-only-for-https-requests-nginx/ 2023-12-01 21:26:34 -05:00			`map $scheme $hsts_header {`
			`https "max-age=63072000;{% if hsts_subdomains == 1 or hsts_subdomains == true -%} includeSubDomains;{% endif %} preload";`
			`}`