feat: added discord domain verification for piste

domains/_discord.piste.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "zpiste",
+        "email": "contact@piste.dev"
+    },
+    "record": {
+        "TXT": "dh=896e7262fdc9ab140d9c5b137e41917e8512a6bd"
+    }
+}