Before you sell anything to the public you need to do a lot of homework.
Yes, you need to make sure you are adding the proper preservatives in proper quantities -- and for that I would highly suggest turing to reliable, professional sources and not to food boards. There are lots of knowledgeable people here, but there are certainly better sources for this kind of information.
Moreover, you will need to research your state and local laws regarding commercial food preparation. You may need to have a permit or license or rent space in a licensed commercial kitchen (many locales do not allow you to prepare food for sale from your home).
Selling food to the public exposes you to very significant legal liability should anything go wrong. You will need special liability insurance to protect your personal assets. Consulting a lawyer before you proceed is a good idea.
Less is not more. More is more and more is fabulous.