docs(en): showcase page

Author: hywax

docs/community/showcase.md

@@ -1 +1,8 @@
 # Showcase
+
+## Add your example
+
+To add your example, create an issue on github. Fill in all the fields and then expect to be added.
+For other users it will be very useful if you share your `config.yml` (removing `secrets` beforehand).
+
+[Send your example](https://github.com/hywax/mafl/issues/new?assignees=&labels=showcase&projects=&template=showcase.yml&title=%5BSHOWCASE%5D+%3Ctitle%3E)