chore(github): add github issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,43 @@
+<!--
+
+Thanks for opening an issue on Portainer !
+
+Do you need help or have a question? Come chat with us on gitter: https://gitter.im/portainer/Lobby.
+
+If you are reporting a new issue, make sure that we do not have any duplicates
+already open. You can ensure this by searching the issue list for this
+repository. If there is a duplicate, please close your issue and add a comment
+to the existing issue instead.
+
+Also, be sure to check our FAQ and documentation first: https://portainer.readthedocs.io
+
+If you suspect your issue is a bug, please edit your issue description to
+include the BUG REPORT INFORMATION shown below.
+
+---------------------------------------------------
+BUG REPORT INFORMATION
+---------------------------------------------------
+You do NOT have to include this information if this is a FEATURE REQUEST
+-->
+
+**Description**
+
+<!--
+Briefly describe the problem you are having in a few paragraphs.
+-->
+
+**Steps to reproduce the issue:**
+
+1.
+2.
+3.
+
+Any other info e.g. Why do you consider this to be a bug? What did you expect to happen instead?
+
+**Technical details:**
+
+* Portainer version:
+* Target Docker version (the host/cluster you manage):
+* Target Swarm version (if applicable):
+* Platform (windows/linux):
+* Browser: