Add build matrix strategy for Docker flavors and update caching configuration

.gitea/workflows/build.yml

@@ -10,6 +10,9 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        flavor: [default, python]
     runs-on: docker-builder
     steps:
       - uses: actions/checkout@v4
@@ -24,7 +27,8 @@ jobs:
           images: |
             git.pollinger.dev/public/texlive
           tags: |
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' && matrix.flavor == 'default' }}
+            type=raw,value=${{ matrix.flavor }},enable=${{ github.ref == 'refs/heads/main' }}
 
 
       - name: Set up Docker Buildx
@@ -44,8 +48,9 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
+          target: ${{ matrix.flavor }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max,image-manifest=true,oci-mediatypes=true,type=registry,ref=git.pollinger.dev/public/texlive:build-cache
+          cache-from: type=registry,ref=git.pollinger.dev/public/texlive:build-cache-${{ matrix.flavor }}
+          cache-to: mode=max,image-manifest=true,oci-mediatypes=true,type=registry,ref=git.pollinger.dev/public/texlive:build-cache-${{ matrix.flavor }}