I reached out to Gary Monger yesterday and asked him how he configured Apache for his SMART on FHIR demo?
See https://learning.intersystems.com/mod/page/view.php?id=2948.
Gary's response was for me to post my question on the Developer Community forum - so that other people can benefit from the answer.

This is what I asked Gary:

I'm after turning a local Health Share instance on my laptop into a SMART on FHIR server.

The *recording about doing all of this is excellent, however, I could do with some instructions on how you configured the Apache web server before running the Cache scripts.

I've been trying to interoperate with careevoltion using their backend-services.
Spec: http://docs.smarthealthit.org/authorization/backend-services/

This involves creating a JWT (JSON Web Token) that I have been unable to do using %OAuth2.JWT:ObjectToJWT.

I downloaded jwt.pfx and then ran the following openssl commands to create some pem files.

openssl pkcs12 -in jwt.pfx -out file.nokey.pem -nokeys
openssl pkcs12 -in jwt.pfx -out file.withkey.pem

openssl rsa -in file.withkey.pem -out file.key

cat file.nokey.pem file.key > file.combo.