Expect-CT middleware
The Expect-CT
HTTP header tells browsers to expect Certificate Transparency. For more, see this blog post and the article on MDN.
Usage:
const expectCt = ; // Sets Expect-CT: max-age=123app; // Sets Expect-CT: enforce, max-age=123app; // Sets Expect-CT: enforce, max-age=30, report-uri="https://example.com/report"app;