A configuration for the HSTS settings for a host.
Allows you to add custom directives supported by a specific user agent.
Specifies the includeSubDomains directive, which applies this policy to any subdomains as well.
includeSubDomains
Specifies how long (in seconds) the client should keep the host in a list of known HSTS hosts:
Specifies the preload HSTS directive, which allows you to include your domain name in the HSTS preload list.
preload