hugo-theme-hilfe/exampleSite/layouts/partials/head/custom.html

<meta http-equiv="Content-Security-Policy" content="default-src 'none'; base-uri 'self'; form-action 'self'; manifest-src 'self'; connect-src 'self'; font-src 'self'; img-src 'self' img.shields.io; script-src 'self' 'unsafe-inline'; style-src 'self'">