Create an issue template

I'm not sure if this is needed but I think it could be useful in lessening the workload.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,28 @@
+Please fill out the following template to make solving your problem easier and faster for us. 
+This is only a guideline. If you think that parts are unneccessary for your issue, feel free to remove them.
+
+Remember to hide/obfuscate personal and confidential information, 
+such as Names, global IP/DNS adresses and especially passwords, if neccessary.
+
+### Subject of the issue
+Describe your issue here.
+
+### Your environment
+* Version of bitwarden_rs, mysql/postgresql/sqlite, docker/package/built from source?
+* If applicable: client used and version
+* If applicable: Reverse proxy and version
+* If applicable: version of mysql/postgresql
+* Other relevant information
+
+### Steps to reproduce
+Tell us how to reproduce this issue. What parameters did you set (differently from the defaults)
+and how did you start bitwarden_rs?
+
+### Expected behaviour
+Tell us what should happen
+
+### Actual behaviour
+Tell us what happens instead
+
+### Relevant logs
+Share some logfiles, screenshots or output of relevant programs with us.