add cname to deploy script

Author: gxywang

package.json

@@ -22,7 +22,7 @@
   },
   "scripts": {
     "predeploy": "npm run build",
-    "deploy": "gh-pages -d build",
+    "deploy": "gh-pages -d build --cname sigrobotics.acm.illinois.edu",
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",