Run CI for feature branches

.forgejo/workflows/book.yml

@@ -2,8 +2,6 @@ name: Build and deploy the book
 
 on:
   push:
-    branches:
-      - main
   pull_request:
   workflow_dispatch:
 
@@ -25,7 +23,7 @@ jobs:
           test -f _book/index.html
 
       - name: Deploy successful main build
-        if: ${{ github.event_name == 'push' || github.event_name == 'workflow_dispatch' }}
+        if: ${{ (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && github.ref == 'refs/heads/main' }}
         env:
           DEPLOY_KEY: ${{ secrets.EACOMPANION_DEPLOY_KEY }}
         run: |