Add: Bug report template

.gitlab/issue_templates/bug_report_client.md

@@ -0,0 +1,31 @@
+## Bug Report
+
+### Summary
+<!-- Short, precise description of the bug -->
+
+### Affected Component
+<!-- e.g. Lobby Menu, Global Chat, Loading screen, ... -->
+
+### Steps to Reproduce
+1. Do this first
+2. Then do that next
+3. Lastly, see the unexprected error message ...
+
+### Expected Behavior
+<!-- What should happen? -->
+
+### Actual Behavior
+<!-- What happens instead? -->
+
+### Stack Trace / Error Message
+```
+<!-- Paste stack trace or log output here -->
+```
+
+### Possible Cause
+<!-- Optional: your own hypothesis about the root cause -->
+
+
+/label ~bug
+
+/label ~client

.gitlab/issue_templates/bug_report_server.md

@@ -0,0 +1,30 @@
+## Bug Report
+
+### Summary
+<!-- Short, precise description of the bug -->
+
+### Affected Component
+<!-- e.g. TransportLayer, CommandRouter, UserRegistry, Response, ... -->
+
+### Steps to Reproduce
+1. Do this first
+2. Then do that next
+3. Lastly, see the unexprected error message ...
+
+### Expected Behavior
+<!-- What should happen? -->
+
+### Actual Behavior
+<!-- What happens instead? -->
+
+### Stack Trace / Error Message
+```
+<!-- Paste stack trace or log output here -->
+```
+
+### Possible Cause
+<!-- Optional: your own hypothesis about the root cause -->
+
+/label ~bug
+
+/label ~server