build: expo on the CI

Author: okwasniewski

apps/example-expo/package.json

@@ -6,6 +6,8 @@
   "scripts": {
     "start": "expo start",
     "reset-project": "node ./scripts/reset-project.js",
+    "build:android": "expo prebuild --platform android && expo run:android",
+    "build:ios": "expo prebuild --platform ios && expo run:ios",
     "android": "expo run:android",
     "ios": "expo run:ios",
     "web": "expo start --web",