Add default template with some useful hints

.gitlab/issue_templates/Default.md

@@ -0,0 +1,29 @@
+<!--
+
+Hello and welcome to our issue tracker! You are interested in helping us to
+improve Funkwhale and we are really glad you take the efforts!
+
+At first, lets look into the right way to submit your thoughts:
+
+* If you are looking for support setting up or using Funkwhale, please consider
+	using our [Support Forum](https://forum.funkwhale.audio/support) or our [Matrix support
+	channel](https://riot.im/app/#/room/#funkwhale-support:tchncs.de).
+* In case you suspect to found a bug, one of the above channels might be a good
+	starting point to validate it, but its also fine to go ahead and report a bug.
+	Please make sure you are using the Bug template in the dropdown above.
+* For smaller additions or feature enhancements, please file a feature request
+	with the template here. 
+* If you have ideas how to extend Funkwhale by completely new features or use
+	cases, please consider starting a thread in our
+	[forum](https://forum.funkwhale.audio/t/development). This way we can have a
+	discussion if this feature is possible or wanted by the community and create
+	tasks for our development team to work towards those goals.
+
+Again: Thank you a lot for considering to submit your ideas and thoughts. Its
+really appreciated! If in doubt, please just hit the submit button anyways so we
+can sort it out together.
+
+Happy listening! :whale:
+
+-->
+