Add npm publish github workflow

Author: Pinank Solanki

.github/workflows/npm-publish.yaml

@@ -0,0 +1,30 @@
+name: Publish SmartUI Storybook package
+
+on:
+  release:
+     types: [published]
+
+jobs:
+  build:
+    if: startsWith(github.ref, 'refs/tags/prod-')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14.15.0
+      - run: npm install
+
+  publish-npm:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14.15.0
+          registry-url: https://registry.npmjs.org/
+      - run: npm install
+      - run: npm publish --access public
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}