GHA: Push to main triggers building the website

.github/workflows/build_website.yml

@@ -0,0 +1,28 @@
+# Ref: https://medium.com/hostspaceng/triggering-workflows-in-another-repository-with-github-actions-4f581f8e0ceb
+# https://docs.github.com/en/rest/about-the-rest-api/api-versions
+name: Build WebsiteTrigger Target Workflow
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  trigger:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Trigger Building plotnine.org
+        run: |
+          # Set the required variables
+          repo_owner="has2k1"
+          repo_name="plotnine.org"
+          event_type="trigger-workflow"
+
+          curl -L \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.BUILD_PLOTNINE_WEBSITE }}" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/$repo_owner/$repo_name/dispatches \
+            -d "{\"event_type\": \"$event_type\", \"client_payload\": {\"unit\": false, \"integration\": true}}"