Fix image name variable

Author: PythonCoderAS

.github/workflows/docker-publish.yml

@@ -13,8 +13,6 @@ on:
 env:
   # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
-  # github.repository as <account>/<repo>
-  IMAGE_NAME: ${{ github.repository }}
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -36,6 +34,11 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      
+      - name: Convert image name to lowercase
+        run: |
+          GITHUB_REPOSITORY="${{ github.repository }}"
+          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}
 
       # Set up BuildKit Docker container builder to be able to build
       # multi-platform images and export cache
@@ -103,6 +106,10 @@ jobs:
     permissions:
       packages: write
     steps:
+      - name: Convert image name to lowercase
+        run: |
+          GITHUB_REPOSITORY="${{ github.repository }}"
+          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}
       - name: Download digests
         uses: actions/download-artifact@v3
         with:
@@ -128,4 +135,4 @@ jobs:
             $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
       - name: Inspect image
         run: |
-          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}
+          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}