Manual drag-n-drop upload to Netlify - how to set base_url?

My site links run fine with a local zola serve

I am uploading by drag-n-drop the public folder into the Netlify web page but the links break due to config.base_url. I can’t figure out how to set the base_url which would normally be put into netlify.toml as:

command = "zola build --base-url $DEPLOY_PRIME_URL"

Any ideas? I prefer not to use github commit as a trigger.

If you run zola build and you have the correct base_url set in config.toml it should work fine.