update scripts

Author: voronianski

package.json

@@ -38,6 +38,8 @@
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test --env=jsdom",
+    "predeploy": "npm run build",
+    "deploy": "gh-pages -d build",
     "eject": "react-scripts eject"
   },
   "homepage": "http://voronianski.github.io/swapi-graphql-react-app",