pipeline: add/vercel workflow

- to deploy "docs-test" version

.github/workflows/deploy-vercel.yml

@@ -0,0 +1,22 @@
+name: Deploy to Vercel
+
+on:
+  push:
+    branches:
+      - develop
+
+jobs:
+  deploy-on-pr:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Vercel CLI
+        run: npm i -g vercel
+
+      - name: Deploy with Vercel and Get URL
+        id: vercel-deploy
+        env:
+          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
+        run: vercel -t $VERCEL_TOKEN --yes --prod

.gitignore

@@ -19,3 +19,4 @@ package-lock.json
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+.vercel