Create 1-issue.md

Author: tomchristie

.github/ISSUE_TEMPLATE/1-issue.md

@@ -0,0 +1,10 @@
+---
+name: Issue
+about: Please only raise an issue if you've been advised to do so after discussion. Thanks! 🙏
+---
+
+## Checklist
+
+- [ ] Raised initially as discussion #...
+- [ ] This cannot be dealt with as a third party library. (We prefer new functionality to be [in the form of third party libraries](https://www.django-rest-framework.org/community/third-party-packages/#about-third-party-packages) where possible.)
+- [ ] I have reduced the issue to the simplest possible case.