Update ISSUE_TEMPLATE.md

Borrow content from Rails' Issue template. It emphasizes reproduction.

Author: BookOfGreg

.github/ISSUE_TEMPLATE.md

@@ -1,9 +1,23 @@
 Help us help you! Have you looked for similar issues? Do you have reproduction steps? [Contributing Guide](CONTRIBUTING.md#reporting-bugs)
 
-- [ ] My app crashes with `react-rails`, so I've included the stack trace and the exact steps which make it crash.
-- [ ] My app doesn't crash, but I'm getting unexpected behavior. So, I've described the unexpected behavior and suggested a new behavior.
-- [ ] I'm trying to use `react-rails` with another library, but I'm having trouble. I've described my JavaScript management setup (eg, Sprockets, Webpack...), how I'm trying to use this other library, and why it's not working.
-- [ ] I have another issue to discuss.
+### Steps to reproduce
+
+(Guidelines for creating a bug report are [available
+here](../CONTRIBUTING.md#reporting-bugs))
+
+### Expected behavior
+Tell us what should happen
+
+### Actual behavior
+Tell us what happens instead
+
+### System configuration
+**Sprockets or Webpacker version**:
+**React-Rails version**:
+**Rect_UJS version**:
+**Rails version**:
+**Ruby version**:
+
 
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