+ add_header X-XSS-Protection "1; mode=block";
+ add_header X-Permitted-Cross-Domain-Policies none;
+ add_header X-Frame-Options DENY;
+ add_header X-Content-Type-Options nosniff;
+ add_header Referrer-Policy same-origin;
+ add_header X-Download-Options noopen;
+ add_header Content-Security-Policy "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://example.tld; upgrade-insecure-requests;";
+
+ # Uncomment this only after you get HTTPS working.
+ # add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
+