Issue Check

• I have checked existing Issues and I feel this feature request has not been raised

Is your feature request related to a problem?

No specific problem.

Describe the solution you'd like

Currently the blowfish theme outputs alt without any label. For full html compliance it would be handy to allow to specify the alt field in the config files.

Describe the alternatives you've considered

The file basic.html in partials/header could be adapted to replace alt="" on line 18 with a value defined in the config files in case the value is defined.

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct