Update ISSUE_TEMPLATE.md

Author: Bart Koelman

.github/ISSUE_TEMPLATE.md

@@ -5,6 +5,7 @@ _Describe your bug or feature request here._
 #### STEPS TO REPRODUCE
 
 _Consider to include your code here, such as models, DbContext, controllers, resource services, repositories, resource definitions etc._
+_Please also include the request URL with body (if applicable) and the full exception stack trace in case of errors._
 
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