Implement HTTP Strict Transport Security on Apigee Edge integrated portail

[Clauther]

Hello,

I am currently using apigee integrated portail with a custom domain, and I want to know if HTTP Strict Transport Security is implemented on the portail ?
If not how can I set this "Strict-Transport-Security: max-age=31536000; includeSubDomains"?
Moreover, is there any additional security you recommend me to implement ?

Thanks in advance for your help.