I've received four files from Comodo:
AddTrustExternalCARoot.crt
COMODORSAAddTrustCA.crt
COMODORSAExtendedValidationSecureServerCA.crt
mydomain.crt
This is my first time setting up a https server.
I know that I have to put on parameters that is passed to https.createServer
but my problem is I don't know which one is the correct property.