Add JSON configuration for Mubashir Rehman portfolio

domains/mubashir-rehman.json

@@ -0,0 +1,10 @@
+{
+  "description": "Mubashir Rehman — Backend Engineer portfolio",
+  "repo": "https://github.com/mubashir-rehman/mubashir-rehman.github.io",
+  "owner": {
+    "username": "mubashir-rehman"
+  },
+  "record": {
+    "CNAME": "mubashir-rehman.github.io"
+  }
+}