Add GitHub templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,25 @@
+---
+name: 'Bug report'
+about: 'Create a bug report to help us improve'
+title: ''
+labels: [ 'bug' ]
+assignees: ''
+---
+
+**Bug description**
+<!-- A clear and concise description of what the bug is. Describe the expected bahavior
+  and how it is currently different. If you are unsure if it is a bug, consider discussing
+  it on our Discord server first. -->
+
+**To Reproduce**
+<!-- Steps to reproduce the behavior. -->
+
+**Context info**
+<!-- Please add relevant information about your system. For example:
+- Version of headscale used
+- Version of tailscale client
+- OS (e.g. Linux, Mac, Cygwin, WSL, etc.) and version
+- Kernel version
+- The relevant config parameters you used
+- Log output
+-->