Issues with GCF/index.md

[mshearer0]

1. Deploy command should be --trigger-http and --runtime=nodejs14 (or swap 14 for more recent version). When deploying need to agree to authorised access to the function.

2. The property with ac-enabled should have client-id as sample-ac-client (not a repeat of sample-ropc-client) and have the client-secret property set

3. The sample-acpkce-client has https://www.google.com as its client-secret value instead of sample-client-secret.

4. The POST commands should have the url in double quotes (at least for windows)

5. PKCE example: Verifier is mis-spelt as verfier.

6. Resource Owner example: username=sample-user not sample-username.

7. PUG file needs updating with GCP region and project values before deployment.

8. To generate pem key files you can use openssl on command line as:

openssl genrsa -aes256 -out priv.pem 4096
openssl rsa -in priv.pem -pubout > public.pem
openssl rsa -in priv.pem -out private.pem

Last step is needed to remove passphrase which will cause tutorial to fail.