Workflow update

Author: KirillSergeevich

.github/workflows/merge-main.yaml

@@ -42,12 +42,16 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
+      - name: Set lowercase repository owner
+        id: lowercase
+        run: echo "repository_owner_lowercase=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_OUTPUT
+
       - name: Build and push
         uses: docker/build-push-action@v4
         with:
           context: .
           push: true
           tags: |
-            ghcr.io/${{ github.repository_owner }}/${{ secrets.DOCKER_IMAGE_NAME }}:prod
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/${{ secrets.DOCKER_IMAGE_NAME }}:prod
+            ghcr.io/${{ steps.lowercase.outputs.repository_owner_lowercase }}/${{ secrets.DOCKER_IMAGE_NAME }}:prod
+          cache-from: type=registry,ref=ghcr.io/${{ steps.lowercase.outputs.repository_owner_lowercase }}/${{ secrets.DOCKER_IMAGE_NAME }}:prod
           cache-to: type=inline