Add configuration to make the vna.is-a.dev domain verified for gh pages

domains/_github-pages-challenge-vainnye.vna.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "vainnye",
+        "email": "vianney.jcqmt@gmail.com"
+    },
+    "records": {
+        "TXT": "1a4b215d30caf77d3f5fc4b40d8ada"
+    }
+}