simplify page build

.github/workflows/build.yml

@@ -19,14 +19,23 @@ env:
   TARGET_BRANCH: "gh-pages"
   CNAME: "coderefinery.org"
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: write
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository and submodules
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         submodules: recursive
     - name: Install zola
@@ -51,20 +60,8 @@ jobs:
             echo -n ${{ env.CNAME }} > public/CNAME
             echo "Used CNAME from the action workflow file"
         fi
-    - name: Debug info
-      env:
-        event_name: ${{ github.event_name }}
-        ref: ${{ github.ref }}
-      run: |
-        echo event_name: "${event_name}"
-        echo github.ref: "${ref}"
-    - name: multipages
-      uses: rkdarst/gh-pages-multibranch@main
-      if: ${{ github.event_name == 'push' }}
-      with:
-        directory: public
     - name: Deploy to gh-pages
-      if: ${{ github.event_name == 'push' }}
+      if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}', env.MAIN_BRANCH) }}
       uses: peaceiris/actions-gh-pages@v3
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}