chore: add issue template (#30)

Author: erezrokah

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: Please replace with a clear and descriptive title
+labels: 'type: bug'
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+
+Steps to reproduce the behavior:
+1. Fork the repository  `https://github.com/<owner>/<repo>/`
+2. Deploy it to Netlify
+3. See that the sitemap file is missing...
+
+**Expected behavior**
+
+A clear and concise description of what you expected to happen.
+
+**Additional context**
+
+Add any other context about the problem here.