Improve issue and pull request template (#4866)

.github/ISSUE_TEMPLATE/support-question.md

@@ -0,0 +1,37 @@
+---
+name: Question
+about: Any questions you might have.
+title: ''
+labels: triage/support
+assignees: ''
+
+---
+
+<!--
+
+Welcome to ingress-nginx!
+
+You probably didn't want to be one this page.  It shouldn't really be here anyway.
+
+* If you want a quick response to a question, ask on the Kubernetes Slack instance in #ingress-nginx.
+
+* If this is actually a bug or a feature request, file one of those.  If you're
+  not sure which, just take a guess and we can always re-label.
+
+* If you think this might turn into a bug or feature request, but you're not
+  sure, try asking in Slack first.
+
+-->
+
+<!--
+
+Still here?  Double-check that this hasn't been asked before, then put your question below
+with as many details as possible.
+
+If you need to include code snippets or logs, please put them in fenced code
+blocks.  If they're super-long, please use the details tag like
+<details><summary>super-long log</summary> lots of stuff </details>
+
+-->
+
+/triage support