Adding arsenobetaine.is-a.dev

Connecting the subdomain to my GitHub page.

domains/arsenobetaine.json

@@ -0,0 +1,11 @@
+{
+    "description": "A personal website for information on me and my projects.",
+    "repo": "https://github.com/arsenobetaine/arsenobetaine.is-a.dev",
+    "owner": {
+        "username": "arsenobetaine",
+        "email": "arsenobetaine@gmail.com"
+    },
+    "record": {
+        "CNAME": "arsenobetaine.github.io"
+    }
+}