added github issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,29 @@
+<!--
+Hi there - thanks for filling an issue. Please ensure the following things before creating an issue - thank you! 🤓
+
+- Make sure to use the latest version of Zammads Docker containers via: docker-compose pull
+- Please write the issue in english
+
+* The upper textblock will be removed automatically when you submit your issue *
+-->
+
+### Infos:
+
+* Docker version:
+* Docker-compose version:
+* Operating system (Docker host):
+
+
+### Expected behavior:
+
+*
+
+
+### Actual behavior:
+
+*
+
+
+### Steps to reproduce the behavior:
+
+*