Configure bug report issue template

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report
+---
+
+<!-- 
+
+1. Please read our Rules of Conduct: https://github.com/yarnpkg/yarn/blob/master/CODE_OF_CONDUCT.md
+
+2. Please search existing issues to avoid creating duplicates. Duplicates will be closed.
+
+3. Currently, not accepting any new feature requests. Please head over to https://github.com/yarnpkg/berry for new feature requests.
+
+-->
+
+
+<!-- Please fill out all sections. Issues with this not compeleted will be closed. --->
+
+
+### Bug description
+<!-- Any context around the issue or bug is helpful. -->
+
+**Command**
+
+```sh
+yarn [your command]
+```
+
+**What is the current behavior?**
+<!-- Describe how yarn is currently functioning with respect to the bug. -->
+
+
+**What is the expected behavior?**
+<!-- Describe how you expect it to work -->
+
+
+**Steps to Reproduce**
+<!-- If you can, provide a link to a public repository which contains the files necessary to reproduce this. -->
+
+1. 
+2.
+
+**Environment**
+
+- Node Version: `x.x.x`
+- Yarn v1 Version: `1.x.x` 
+- OS and version: 

.github/ISSUE_TEMPLATE/bug_report.yml

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+
+blank_issues_enabled: false
+contact_links:
+  - name: Yarn v1 documentation
+    url:  https://legacy.yarnpkg.com/en/docs
+    about: Please visit the documentation for v1.x.x before opening a bug report