ISSUE_TEMPLATE.md in fluent-plugin-elasticsearch-2.12.0 vs ISSUE_TEMPLATE.md in fluent-plugin-elasticsearch-2.12.1

- old
+ new

@@ -21,5 +21,6 @@
   * paste result of ``fluentd --version`` or ``td-agent --version``
 * ES plugin 2.x.y or 1.x.y
   * paste boot log of fluentd or td-agent
   * paste result of ``fluent-gem list``, ``td-agent-gem list`` or your Gemfile.lock
 * ES version (optional)
+* Bear Metal or Within Docker or Kubernetes or others? (optional)