Added matrix build for multiple python versions

.forgejo/workflows/build_release.yml

@@ -1,11 +1,19 @@
 on:
   push:
-    tags:
-      - '[0-9]+\.[0-9]+'
+    branches:
+      - 'main'
+    paths:
+      - '.forgejo/workflows/*'
+      - 'Dockerfile'
+      - 'pip.conf'
 
 jobs:
   build:
     runs-on: dind
+    strategy:
+      matrix:
+        python-version: [ '3.9', '3.10', '3.11', '3.12' ]
+    name: build-python-${{ matrix.python-version }}
     steps:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -19,7 +27,9 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           push: true
-          tags: forgejo.neshweb.net/ci-docker-images/python-neshweb:${{ github.ref_name }}
+          build-args: |
+            PYTHON_VERSION=${{ matrix.python-version }}
+          tags: forgejo.neshweb.net/ci-docker-images/python-neshweb:${{ matrix.python-version }}
 
   release:
     needs: [ build ]