Fix issue with building same image

Author: mehr74

.github/workflows/docker-build-images.yaml

@@ -38,7 +38,7 @@ jobs:
     - name: Build, tag, and push docker image to Amazon ECR
       uses: docker/build-push-action@v5
       with:
-        context: ./src/grafana
+        context: ./src/${{ matrix.image }}
         push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         tags: 615677714887.dkr.ecr.eu-central-1.amazonaws.com/postgres-grafana-on-ecs-${{ matrix.image }}-repo
         cache-from: type=gha