Add issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,20 @@
+---
+name: Bug report
+about: Report a problem within technic
+title: ''
+labels: Bug
+assignees: ''
+
+---
+
+Technic has no main developer and largely depends on
+user-provided Pull Requests. It will take a while until
+even important issues are noticed.
+Please consider proposing a PR directly.
+_______________________________________________
+
+
+**Bug description**
+
+
+**Steps to reproduce this issue**