Add templates for issues and PRs

Signed-off-by: Jonas Zohren <15788906+jfowl@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,40 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: 'bug'
+assignees: ''
+
+---
+
+<!-- If you're requesting an improvement for an existing feature, then please consider filling out an "enhancement request" instead! -->
+<!-- If you're requesting a new feature, that isn't part of this project yet, then please consider filling out a "feature request" instead! -->
+
+**Description**
+<!-- A clear and concise description of what the bug is. -->
+
+**To Reproduce**
+<!-- Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error -->
+
+**Expected behavior**
+<!-- A clear and concise description of what you expected to happen. -->
+
+**Logs**
+<!-- If applicable, add an excerpt from the server logs where the error is reported. Remember to censor sensitive values. -->
+
+**Config**
+<!-- If applicable, copy and paste your config (or ideally only relevant parts of it) here. Remember to censor sensitive values. -->
+
+**Your Setup (please complete the following information):**
+ - Host OS: [e.g. Ubuntu 20.04]
+ - NodeJS version [run `node --version`]
+ - HedgeDoc version (Click "Version info" in the footer)
+     - server [e.g. 2.0]
+     - client [e.g. 2.0]
+
+**Additional context**
+<!-- Add any other context about the problem here. -->