I am glad that you see the value of using a pipeline to automate your cookbook lifecycle. Unfortunately the Delivery Workflow for Chef Automate is now a legacy feature and is not available for new users. There is a document on this here: https://automate.chef.io/docs/workflow/.
There are many great CI/CD solutions out there both free and paid that are able to achieve the same behavior and you can certainly use the Workflow documentation as a guide to how you should design your cookbook pipeline. If you are looking for guidance or want to get a full presentation please fill out a contact form and a representative will reach out to you. https://www.chef.io/contact-us/
Also we have our ChefConf happening online on June 2nd and 3rd. You can find out about what is new for Chef and some of the great examples of the latest innovations in infrastructure, application and compliance automation. http://chefconf.io
Hope this answer helps.
Chef Federal Customer Architect