Make sure user's name is lowercase

Signed-off-by: Salvatore Daniele <[email protected]>

.github/workflows/build-and-push.yml

@@ -7,23 +7,29 @@ on:
 
 jobs:
   build-and-push:
-
     runs-on: ubuntu-latest
 
     steps:
     - name: Checkout code
       uses: actions/checkout@v2
+
     - name: Set up Docker Buildx
       run: |
         docker buildx create --use
+
+    - name: Convert GitHub repository owner to lowercase
+      id: lowercase_owner
+      run: echo "owner=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
+
     - name: Log in to GitHub Container Registry
       run: |
         echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
     - name: Build and Push Multiarch Image to ghcr.io
       run: |
         docker buildx build \
           --file ./Containerfile \
           --platform linux/arm64,linux/amd64 \
-          --tag ghcr.io/${{ github.repository_owner }}/ocp-traffic-flow-tests:pr_test \
+          --tag ghcr.io/${{ env.owner }}/ocp-traffic-flow-tests:pr_test \
           --push \
           .