Storybook work

chapter06/package.json

@@ -6,7 +6,7 @@
         "@storybook/addon-actions": "^3.4.7",
         "@storybook/addon-links": "^3.4.7",
         "@storybook/addons": "^3.4.7",
-        "@storybook/react": "^3.4.7",
+        "@storybook/react": "^3.4.8",
         "babel-core": "^6.26.3",
         "babel-eslint": "^8.2.3",
         "babel-runtime": "^6.26.0",
@@ -27,7 +27,7 @@
         "test": "react-app-rewired test --env=jsdom",
         "eject": "react-app-rewired eject",
         "storybook": "start-storybook -p 9009 -s public",
-        "build-storybook": "build-storybook -s public",
+        "build-storybook": "build-storybook -s public -o out_sb",
         "flow": "flow",
         "addTypes": "flow-typed install"
     },