It would be beneficial to be familiar with the code for our service, as introduced in Chapter 4, Introduction to the ACME Registration Service.
You might also find it useful to read and run the full versions of the code for this chapter, available at https://github.com/PacktPublishing/Hands-On-Dependency-Injection-in-Go/tree/master/ch07.
Instructions on how to obtain the code and configure the sample service are available in the README file, found at https://github.com/PacktPublishing/Hands-On-Dependency-Injection-in-Go/.
You can find the code for our service, with the changes from this chapter already applied, in ch07/acme.