hyperledger
Update Chaincode-as-a-Service docs to reflect the new default ccaas builder
The Fabric docs on CCaaS external builders are out of date and still too complicated for general consumption. The External Builders section includes enough detail for users that seek to override the embedded defaults with a custom cc compiler.
Update this section of the docs / guide to reflect the new, default external ccaas builder embedded into the Fabric > 2.4.1 peer image. This is also a good location in the docs trail to address invocation of a CC running on the local host via reverse proxy in cloud-based environments, or direct connection to a CC endpoint attached to an IDE.
The new default builders make it really, really easy to work with chaincode. The code is wired up, and works great. The docs still present a bit of an uphill climb.
