Add ISSUE_TEMPLATE.md (#139)

Co-authored-by: julian.mora <julian.mora@bizagi.com>

.github/ISSUE_TEMPLATE.md

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+## Expected Behavior
+
+
+## Actual Behavior
+
+
+## Possible Solution
+
+
+## Steps to Reproduce the Problem
+
+  1.
+  2.
+  3.
+
+## Specifications
+
+  - OS Platform and Distribution (e.g., Linux Ubuntu 16.04):
+  - Node version:
+  - Database engine (e.g., SQLite):