ci: use matrix to support multi image build

.gitea/workflows/debian.yaml

@@ -1,10 +1,28 @@
 name: Build Debian
+
 on:
   workflow_dispatch:
 
 jobs:
-  debian-trixie:
-    runs-on: ubuntu-latest 
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: debian:latest
+            dockerfile: debian/Dockerfile
+            tag: debian:latest
+          - name: debian-trixie
+            dockerfile: debian/Dockerfile
+            tag: debian:trixie
+          - name: debian:bookworm
+            dockerfile: debian/bookworm.Dockerfile
+            tag: debian:bookworm
+
+    name: Build ${{ matrix.name }}
+
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -19,6 +37,6 @@ jobs:
         run: |
           docker build --push \
             --platform=linux/amd64,linux/arm64 \
-            -f debian/Dockerfile \
-            -t ${{ vars.DOCKER_USERNAME }}/debian:trixie \
+            -f ${{ matrix.dockerfile }} \
+            -t ${{ vars.DOCKER_USERNAME }}/${{ matrix.tag }} \
             .