Add issue template

ISSUE_TEMPLATE.md

@@ -0,0 +1,27 @@
+---
+
+name: "Issue"
+about: "Something isn't working as expected"
+
+---
+
+## Your setup
+
+[] OTP
+[x] From Source
+  [] Distro: 
+[] Docker (what setup?)
+
+Postgres version:
+
+## What were you trying to do?
+
+## What did you expect to happen?
+
+## What actually happened?
+
+## Relative severity (does this prevent you from using the software as normal?)
+
+[] High - I cannot use the software
+[] Medium - I cannot use it as easily as I'd like
+[] Low - I can get by