doc: improve ISSUE_TEMPLATE.md

Author: l-lin

.github/ISSUE_TEMPLATE.md

@@ -10,21 +10,10 @@ ISSUES MISSING IMPORTANT INFORMATION MAY BE CLOSED WITHOUT INVESTIGATION.
 
 <!-- Check one of the following options with "x" -->
 <pre><code>
-[ ] Regression (a behavior that used to work and stopped working in a new release)
 [ ] Bug report  <!-- Please search GitHub for a similar issue or PR before submitting -->
 [ ] Feature request
 [ ] Documentation issue or request
-</code></pre>
-
-## What versions you are using?
-
-<pre><code>
-- node version:
-- angular version:
-- angular-cli version:
-- jquery version:
-- datatables version:
-- angular-datatables version:
+[ ] Question
 </code></pre>
 
 ## Current behavior
@@ -38,9 +27,22 @@ ISSUES MISSING IMPORTANT INFORMATION MAY BE CLOSED WITHOUT INVESTIGATION.
 ## Minimal reproduction of the problem with instructions
 
 <!--
+Please provide your HTML/TS codes!
+
 For bug reports please provide the *STEPS TO REPRODUCE* and if possible a *MINIMAL DEMO* of the problem via
-https://plnkr.co or similar (you can use this template as a starting point: http://plnkr.co/edit/FUm69kMAmmSXnlvWxL4f).
+https://stackblitz.com or similar (you can use this template as a starting point: https://stackblitz.com/fork/angular-datatables-gitter).
 Write your example code using [Markdown](https://help.github.com/articles/github-flavored-markdown) syntax. Really, it's not difficult...
 
 Forgive me for being blunt, but if you can't follow this simple issue template (especially the code), don't expect me to help you efficiently!!!
 -->
+
+## Environment
+
+<pre><code>
+- node version:
+- angular version:
+- angular-cli version:
+- jquery version:
+- datatables version:
+- angular-datatables version:
+</code></pre>