removed obsolete docker containers and references

.github/workflows/docker-containers.yml

@@ -66,64 +66,3 @@ jobs:
           cache-from: type=registry,ref=${{ secrets.DOCKER_USERNAME }}/pwpush:buildcache
           cache-to: type=registry,ref=${{ secrets.DOCKER_USERNAME }}/pwpush:buildcache,mode=max,ignore-error=${{env.DOCKER_PUSH == 'false'}}
 
-  # 'buildObsolete'-job can be completly removed after dropping support
-  # for old docker images.
-  buildObsolete:
-    needs: build
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - dbType: ephemeral
-          - dbType: mysql
-          - dbType: postgres
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Set DOCKER_PUSH for workflow_dispatch
-        if: ${{ github.event_name == 'workflow_dispatch' }}
-        run: echo "DOCKER_PUSH=${{ github.event.inputs.dockerPush }}" >> $GITHUB_ENV
-
-      - name: Populate Docker metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ secrets.DOCKER_USERNAME }}/pwpush-${{ matrix.dbType }}
-          flavor: |
-            latest=false
-          tags: |
-            type=match,pattern=release
-            type=schedule,pattern=latest
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=semver,pattern={{major}}
-            type=semver,pattern=latest
-            type=sha,enable=${{ github.event_name == 'workflow_dispatch' }}
-
-      - name: Login to DockerHub
-        uses: docker/login-action@v3
-        if: ${{env.DOCKER_PUSH == 'true'}}
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-
-      - name: Build and push pwpush-${{ matrix.dbType }} Docker images
-        uses: docker/build-push-action@v5
-        with:
-          file: ./containers/docker/pwpush-${{ matrix.dbType }}/Dockerfile
-          platforms: linux/amd64,linux/arm64
-          provenance: false
-          push: ${{env.DOCKER_PUSH == 'true'}}
-          labels: ${{ steps.meta.outputs.labels }}
-          tags: ${{ steps.meta.outputs.tags }}
-          build-args: |
-            BASEIMAGE=${{ secrets.DOCKER_USERNAME }}/pwpush:${{ steps.meta.outputs.version }}