Add showcase gif

DECISIONS.md

@@ -4,6 +4,8 @@ Fill this in before you send your submission back — a few minutes is plenty. I
 
 ## What I built and why
 
+![showcase](https://uwu.stedos.dev/f/QV79RO)
+
 * A new `POST` endpoint was added to allow for the creation of mission launches. An example curl request for the new enpoint is:
 ```console
 curl --request POST \