Update issue template

Adopting a Problem/Solution format.

.github/ISSUE_TEMPLATE.md

@@ -1,9 +1,42 @@
-- **I'm submitting a ...**
-  [ ] bug report
-  [ ] feature request
-  [ ] question about the decisions made in the repository
-  [ ] question about how to use this project
+<!-- Delete all but one category --> 
+This is a **bug report/feature or change request/support request**
 
-- **Summary**
+## Problem
 
-- **Other information** (e.g. detailed explanation, stack traces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)
+<!--
+Describe in details the problem or scenario that you are facing or trying to solve
+
+If this is a feature request, then focus on the WHY you want the change.
+E.g.: As a user of my dApp, I want to know that X happened when I do Y.
+
+If this is a bug report or support, please provide a code snippet that reproduces the issue or relevant steps.
+Describe the actual behavior vs expected behavior.
+Please also include logs.
+-->
+
+## Proposed Solutions
+
+<!--
+Describe one or several (or none) solutions to fix the problem describe above.
+
+If this is a feature request, then focus on WHAT or HOW you want to see the change happen.
+Feel free to itemize requirements. E.g.:
+
+- Function `foo` must return information about `bar`.
+- Function `blah` must allow me to pass argument `boo`.
+
+Or describe current vs wanted behaviour.
+
+If this is a bug report and you know how to fix the problem, feel free to include a proposal or open a PR.
+Or feel free to omit this section.
+-->
+
+## Notes
+
+<!--
+Add any miscellaneous note that are relevant to issue, including but not limited to:
+
+- js-waku version
+- Environment (browser software and version, system software and version)
+- Nodes connected to too (e.g. Status test fleet)
+- etc