ci: separate PR (build only) and Push (build and deploy)

.github/workflows/build.yml

@@ -0,0 +1,29 @@
+
+name: 🦕 Build D4G Docusaurus website on Pull Request
+
+on:
+  # Triggers the workflow on Pull Request events but only for the default branch
+  pull_request:
+    branches:
+      - master
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build Docusaurus
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install dependencies and build website
+        run: |
+          yarn install --frozen-lockfile
+          yarn build
+

.github/workflows/deploy.yml

@@ -2,12 +2,14 @@
 name: 🦕 Build and Deploy D4G Docusaurus website to GitHub Pages
 
 on:
+  # Triggers the workflow on push events but only for the default branch
   push:
     branches:
       - master
-    # Review gh actions docs if you want to further define triggers, paths, etc
-    # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#on
 
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
 jobs:
   build:
     name: Build Docusaurus