Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,30 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Environment (please complete the following information):**
+ - Bitcoin Core / Node Version [e.g. 0.16.3]
+ - NodeJS Version [e.g. 9.x]
+ - Browser [e.g. chrome, safari]
+ - Code Version / Commit [e.g. ab6cde8]
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Screenshots or Log Output**
+If applicable, add screenshots or log output to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.