It looks like perhaps you are looking at starting an APP vs an actual food service, am I correct? If that is NOT the case, don't read any further...
If that IS the case, a quick search shows several options for app development, but that is only a small part of what you face. Your biggest challenge will be creating a brand and marketing your service. It's no longer a "build it and they will come" but more of a "serve it, tell it and attract them" model.
Your marketing will need to address two audiences, the food services and the public. Be sure to account for the needs and problems that you are solving for each. Also be sure to have a specific monetization strategy at the start - advertising or PPC are common.
Let me know if you would like to talk more, and hopefully I've understood your question.
-JL