Create custom.md

Author: jo-elimu

.github/ISSUE_TEMPLATE/custom.md

@@ -0,0 +1,20 @@
+---
+name: Custom elimu.ai issue
+about: 'Create a new issue (from elimu.ai template)'
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Description
+<!-- Describe your issue -->
+
+
+## Why?
+<!-- Explain _why_ this issue is needed -->
+
+
+---
+
+> elimu.ai's mission is to build innovative learning software that empowers out-of-school children to teach themselves basic reading📖, writing✍🏽 and math🔢 **within 6 months**.