Gatsby starter workflow

Signed-off-by: Gopal S Akshintala <gopala.akshintala@salesforce.com>

Author: overfullstack

.github/workflows/gatsby.yml

@@ -1,44 +1,82 @@
-name: Gatsby Publish to Github Pages
+# Sample workflow for building and deploying a Gatsby site to GitHub Pages
+# https://github.com/actions/starter-workflows/blob/main/pages/gatsby.yml
+#
+name: Publish Gatsby site to Pages
+
 on:
+  # Runs on pushes targeting the default branch
   push:
-    branches: ["source-v2"]
+    branches: ["$DEFAULT_BRANCH"]
+
+  # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
   contents: read
   pages: write
   id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
 concurrency:
   group: "pages"
   cancel-in-progress: false
+
+# Default to bash
 defaults:
   run:
     shell: bash
+
 jobs:
+  # Build job
   build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
       - name: volta-cli
         uses: volta-cli/action@v4.0.1
       - name: Setup Node
-        uses: actions/setup-node@v4.0.1
+        uses: actions/setup-node@v4
         with:
           cache: yarn
-      - name: Configure GitHub Pages
+      - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v4.0.0
+        uses: actions/configure-pages@v4
+        with:
+          # Automatically inject pathPrefix in your Gatsby configuration file.
+          #
+          # You may remove this line if you want to manage the configuration yourself.
+          static_site_generator: gatsby
       - name: Restore cache
-        uses: actions/cache@v4.0.0
+        uses: actions/cache@v4
         with:
           path: |
             public
             .cache
           key: ${{ runner.os }}-gatsby-build-${{ hashFiles('public') }}
           restore-keys: |
             ${{ runner.os }}-gatsby-build-
-      - name: Gatsby Publish
-        uses: enriikke/gatsby-gh-pages-action@v2.2.1
+      - name: Install dependencies
+        run: yarn install
+      - name: Build with Gatsby
+        env:
+          PREFIX_PATHS: 'true'
+        run: yarn build
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
         with:
-          access-token: ${{ secrets.ACCESS_TOKEN }}
+          path: ./public
 
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4