add github issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,38 @@
+<!--- Is this a bug? -->
+<!--- This issue tracker is only used for tracking bugs. Please use the mailing
+      list, if you have any question or need help.
+      See: https://imposm.org/docs/imposm3/3.0.0/#support -->
+
+<!--- It is a bug! -->
+<!--- Please provide a general summary of the issue in the Title above -->
+
+## Context
+<!--- Provide a more detailed introduction to the issue itself, and why you consider it to be a bug -->
+
+## Expected Behavior
+<!--- Tell us what should happen -->
+
+## Actual Behavior
+<!--- Tell us what happens instead -->
+
+## Possible Fix
+<!--- Not obligatory, but suggest a fix or reason for the bug -->
+
+## Steps to Reproduce
+<!--- Provide a an unambiguous set of steps to reproduce this bug -->
+<!--- Include _minimal_ but _complete_ configurations and test datasets. -->
+<!--- Use https://gist.github.com to link to larger configurations. -->
+1.
+2.
+3.
+4.
+
+## Context
+<!--- How has this bug affected you? What were you trying to accomplish? -->
+
+## Your Environment
+<!--- Include as many relevant details about the environment you experienced the bug in -->
+* Version used:
+* Environment name and version (e.g. PostgreSQL x.y.z with PostGIS a.b.c):
+* Server type and version:
+* Operating System and version: