Add matrix

Author: reakaleek

.github/workflows/pr.yml

@@ -19,7 +19,11 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
     steps:
       - uses: actions/checkout@v4
 
@@ -37,6 +41,7 @@ jobs:
         run: ./build.sh publishbinaries
 
       - uses: actions/upload-artifact@v4
+        if: matrix.os == 'ubuntu-latest'
         with:
           name: docs-builder-binary
           path: .artifacts/publish/docs-builder/release/docs-builder