chore(env): add production url comments
chore(env): add production url comments

Add production service urls as comments to the default
environmental variables.

aimeex3/spark-js-sdk,mwegman/spark-js-sdk,adamweeks/spark-js-sdk,mwegman/spark-js-sdk,mwegman/spark-js-sdk,adamweeks/spark-js-sdk,aimeex3/spark-js-sdk,adamweeks/spark-js-sdk,aimeex3/spark-js-sdk