Update dotenv.sample based on review comments

Author: brandoncharnesky

dotenv.sample

@@ -1,22 +1,8 @@
-# Copy this file and name the new copy ".env" to get started
-# Change all example values to match your MyDataHelpsDesigner project
-
-# The Project GUID
-#
-# Found in MyDataHelpsDesigner via Projects -> About Settings -> Project ID
+# See README.md for instructions on setting up the .env file
 #
-RKS_PROJECT_ID="361e1234-8c15-78ae-1234-3b70d33023d6"
+RKS_PROJECT_ID=
 
-# The name of the Service Account 
-#
-# Found in MyDataHelpsDesigner via Settings -> Workspace Settings -> Service Accounts
-#
-RKS_SERVICE_ACCOUNT="MyDataHelps.1234ABCD.AccountName"
+RKS_SERVICE_ACCOUNT=
 
-# The private key of the Service Account
-#
-# Found in MyDataHelpsDesigner via Settings -> Workspace Settings -> Service Accounts
-# Be sure to include the begin/end tags
 # You can use \n to separate the lines in your private key
-#
-RKS_PRIVATE_KEY="-----BEGIN RSA PRIVATE KEY-----\n230703de230703de230703de\nb62b0e24b62b0e24b62b0e24\n...\n-----END RSA PRIVATE KEY-----"
+RKS_PRIVATE_KEY=