UIDS-15 deploy to github pages automatically after PRs are merged

Author: Dave Ferris

.github/workflows/gh-pages-deploy.yml

@@ -0,0 +1,20 @@
+  name: Deploy to github pages
+  on:
+    push:
+      branches:
+        - master
+  jobs:
+    gh-pages-deploy:
+      name: Deploying to gh-pages
+      runs-on: ubuntu-latest
+      steps:
+        - name: Checkout branch
+          uses: actions/checkout@v2
+
+        - name: Install dependencies
+          run: yarn install
+
+        - name: Run deploy script
+          run: yarn deploy-storybook -- --ci
+          env:
+            GH_TOKEN: ${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}