add issue templates

Author: Hongshan Li

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,17 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Link to the notebook**
+Which notebook you run into trouble
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Ask a question
+    url: https://stackoverflow.com/questions/tagged/amazon-sagemaker
+    about: Use Stack Overflow to ask and answer questions

.github/ISSUE_TEMPLATE/example-request.md

@@ -0,0 +1,19 @@
+---
+name: Example request
+about: Suggest an use case example you want to see
+title: I want to see ...
+labels: ''
+assignees: ''
+
+---
+
+**Describe the use case example you want to see**
+
+
+
+**Describe what SageMaker services are involved**
+
+
+
+
+**Describe what AWS services (other than SageMaker) are involved***