Restaurants or any public business open atm: advertise your workers PTO and sick leave policy.

The ONLY way I'm considering eating out (takeout or delivery) at the moment is if I believe your workers can stay home if they're sick and don't have to choose between coming to work sick or not feeding their family. All but two people in my life fall under the vulnerable category, and it's too big a risk for me to spread it. It will be better for you in the long run to temporarily close because you can't staff than for infection to get traced back to your worker. Imagine that public relations nightmare.