fix: add script

Author: zyao89

package.json

@@ -7,6 +7,7 @@
         "prepublishOnly": "npm run test",
         "test": "jest",
         "release": "micro-app release",
+        "publish:alpha": "npm publish --tag alpha",
         "publish:next": "npm publish --tag next"
     },
     "files": [