DOC: Add links to stackexchange tag

.github/ISSUE_TEMPLATE/question.md

@@ -1,9 +1,11 @@
 ---
 name: Question
-about: Please search existing issues to avoid creating duplicates
+about: Please search existing issues or GIS Stack Exchange (https://gis.stackexchange.com/questions/tagged/geocube) to avoid creating duplicates
 labels: question
 ---
 
 <!--
 Please search existing issues to avoid creating duplicates.
--->
+Please check if someone has already asked the same/similar question on GIS Stack Exchange https://gis.stackexchange.com/questions/tagged/geocube.
+
+-->

README.rst

@@ -46,6 +46,12 @@ Documentation
 - Stable: https://corteva.github.io/geocube/stable/
 - Latest: https://corteva.github.io/geocube/latest/
 
+Bugs/Questions
+--------------
+
+- Report bugs/ask questions: https://github.com/corteva/geocube/issues
+- Ask developer questions: https://gitter.im/corteva--geocube/community
+- Ask the community: https://gis.stackexchange.com/questions/tagged/geocube
 
 Credits
 -------