add GitHub Page Deploy flow

Author: kamiazya

.github/workflows/generate-doc-and-deploy.yml

@@ -0,0 +1,31 @@
+name: Generate Doc and Deploy
+
+on:
+  push:
+    branches:
+    - master
+
+jobs:
+  deploy:
+    name: Deploy to gh-pages
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: 10.x
+    - name: Install dependencies
+      run: yarn --frozen-lockfile
+      env:
+        CI: true
+    - name: Generate Storybook
+      run: yarn storybook:build
+      env:
+        CI: true
+    - name: Deploy
+      uses: peaceiris/actions-gh-pages@v2.5.0
+      env:
+        PERSONAL_TOKEN: ${{ secrets.PERSONAL_TOKEN }}
+        PUBLISH_BRANCH: gh-pages
+        PUBLISH_DIR: ./docs