add issue template

.github/ISSUE_TEMPLATE/bug-report-for-canal.md

@@ -0,0 +1,23 @@
+- [ ] I have searched the [issues](https://github.com/alibaba/canal/issues) of this repository and believe that this is not a duplicate.
+- [ ] I have checked the [FAQ](https://github.com/alibaba/canal/wiki/FAQ) of this repository and believe that this is not a duplicate.
+
+### environment
+
+* canal version
+* mysql version
+
+### Issue Description
+
+
+### Steps to reproduce
+
+### Expected behaviour
+
+### Actual behaviour
+
+
+If there is an exception, please attach the exception trace:
+
+```
+Just put your stack trace here!
+```