Fix Docker image tag to use lowercase

Author: ServerSideHannes

.github/workflows/docker-publish.yml

@@ -8,10 +8,6 @@ on:
         required: true
         type: string
 
-env:
-  REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
-
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
@@ -27,19 +23,18 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Log in to Container Registry
-        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3.6.0
         with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
+          registry: ghcr.io
+          username: serversidehannes
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.tag }}
+          push: true
+          tags: ghcr.io/serversidehannes/s3proxy-python:${{ inputs.tag }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
           platforms: linux/amd64,linux/arm64