Storybook gh-pages / adding travis script for this (#6269)

* updating travis script

* removing dev/null per comment

* storybook config override-wip

* removing override storybook config

* updating travis

* moving deploy script to stage ,removing if ck

* adding lang info

* adding node v

* testing

* reverting last change

* adding condition, dev/null back

* overriding deployer message

* updating per comment

.travis.yml

@@ -81,3 +81,9 @@ jobs:
     - stage:
       <<: *tox
       env: TOXENV=dennis-lint
+    - stage: Storybook deployment
+      if: branch = master
+      language: node_js
+      node_js: '8'
+      script: echo "Deploying to GitHub Pages..."
+      after_success: yarn storybook-deploy --ci > /dev/null 2>&1

package.json

@@ -352,6 +352,9 @@
     "webpack-hot-middleware": "^2.18.0",
     "webpack-subresource-integrity": "^1.0.0-rc.1"
   },
+  "storybook-deployer": {
+    "commitMessage": "[skip ci] Deploy Storybook to Github Pages"
+  },
   "bundlesize": [
     {
       "path": "./dist/@(amo|disco)-!(i18n-)*.js",