Re-add headers to requests for /

Bug introduced in a174dd5.

nginx.conf

@@ -81,6 +81,16 @@ http {
 		}
 
 		location ~ \.html$ {
+			# location executed for: /, /Items.html
+			if ($request_uri ~ "^/(\?|$)") {
+				# Headers need to be repeated when / is fetched
+				add_header Cache-Control "no-cache";
+				add_header Referrer-Policy "same-origin";
+				add_header Strict-Transport-Security "max-age=63072000";
+				add_header X-Content-Type-Options "nosniff";
+				add_header X-XSS-Protection "1; mode=block";
+			}
+
 			if ($request_uri ~ "^/index.html(\?|$)") {
 				# Prevent serving duplicate content, do not serve /index.html.
 				return 301 /;