Build pages on PRs but dont publish (#21)

.github/workflows/publish-pages.yml

@@ -6,31 +6,32 @@ on:
       - main
     paths:
       - 'static/**'
+      - '.github/workflows/publish-pages.yml'
   workflow_run:
     workflows:
       - Publish Firmware
     types:
       - completed
+  pull_request:
+    paths:
+      - 'static/**'
+      - '.github/workflows/publish-pages.yml'
 
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
-  build-and-publish:
-    name: Build and publish site
+  build:
+    name: Build
     runs-on: ubuntu-latest
-    permissions:
-      pages: write
-      id-token: write
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4.2.2
 
+      - run: mkdir -p output/firmware
+
       - name: Build
         uses: actions/jekyll-build-pages@v1.0.13
         with:
@@ -50,6 +51,19 @@ jobs:
           path: output
           retention-days: 1
 
+  publish:
+    if: github.event_name != 'pull_request'
+    name: Publish
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
       - name: Setup Pages
         uses: actions/configure-pages@v5.0.0