update issue templates

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Report a bug in Flask (not other projects which depend on Flask)
+---
+
+<!--
+This issue tracker is a tool to address bugs in Flask itself. Please use
+Pallets Discord or Stack Overflow for questions about your own code.
+
+Replace this comment with a clear outline of what the bug is.
+-->
+
+<!--
+Describe how to replicate the bug.
+
+Include a minimal reproducible example that demonstrates the bug.
+Include the full traceback if there was an exception.
+-->
+
+<!--
+Describe the expected behavior that should have happened but didn't.
+-->
+
+Environment:
+
+- Python version:
+- Flask version:

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security issue
+    url: security@palletsprojects.com
+    about: Do not report security issues publicly. Email our security contact.
+  - name: Questions
+    url: https://stackoverflow.com/questions/tagged/flask?tab=Frequent
+    about: Search for and ask questions about your code on Stack Overflow.
+  - name: Questions and discussions
+    url: https://discord.gg/pallets
+    about: Discuss questions about your code on our Discord chat.

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,15 @@
+---
+name: Feature request
+about: Suggest a new feature for Flask
+---
+
+<!--
+Replace this comment with a description of what the feature should do.
+Include details such as links relevant specs or previous discussions.
+-->
+
+<!--
+Replace this comment with an example of the problem which this feature
+would resolve. Is this problem solvable without changes to Flask, such
+as by subclassing or using an extension?
+-->