throws uppercase repository error when repository is in lowercase

[schniti269]

Contributing guidelines

• [X] I've read the contributing guidelines and wholeheartedly agree

I've found a bug, and:

• [X] The documentation does not mention anything about my problem
• [X] There are no open or closed issues that are related to my problem

Description

Error: buildx failed with: ERROR: invalid tag "containersfallstudie.azurecr.io/***/frontendweb:14c4b972e95f9c491fa8557c104fd81f71ee2c05": repository name must be lowercase

if you are telling me i cant have uppercase secrets in this string why would that even make sense

Expected behaviour

pass as IT IS ALLLLLLLL IN LOWERCASEEEEEEEEE

Actual behaviour

FAIL

Repository URL

No response

Workflow run URL

No response

YAML workflow

- name: Build and push container image to registry
      uses: docker/build-push-action@v3
      with:
        push: true
        tags: containersfallstudie.azurecr.io/${{ secrets.AzureAppService_ContainerUsername_64da62845f5d4ca190df25f8e243d528 }}/frontendweb:${{ github.sha }}
        file: ./Dockerfile

Workflow logs

No response

BuildKit logs

No response

Additional info

No response

[crazy-max]

Error: buildx failed with: ERROR: invalid tag "containersfallstudie.azurecr.io/***/frontendweb:14c4b972e95f9c491fa8557c104fd81f71ee2c05": repository name must be lowercase

Value of ${{ secrets.AzureAppService_ContainerUsername_64da62845f5d4ca190df25f8e243d528 }} secret must contain capital letters otherwise it would not return this error. Please check your secret.

See also https://github.com/docker/build-push-action/blob/master/TROUBLESHOOTING.md#repository-name-must-be-lowercase