Create minjie.json for personal portfolio

Added a JSON file for Minjie Wang's personal portfolio with description, owner details, and DNS records.

domains/minjie.json

@@ -0,0 +1,10 @@
+{
+  "description": "Personal portfolio for Minjie Wang, a CS and AI student focused on marine ecological forecasting and engineering projects.",
+  "owner": {
+    "username": "Kevinminjie",
+    "email": "wmj_dlou@163.com"
+  },
+  "records": {
+    "A": ["124.223.77.157"]
+  }
+}