This is an http web server implemented in Go and using Go Modules.
You can either start the application using a binary generated by go build cmd/account-service/main.go or by running a container with its image wandsilva/go-account-service-server:1.0.0. For the later, you can use the Dockerfile or get the image from Docker Hub.
If your are going to run using the binary, use a port number as the first and only argument for it. Example: ./main 3000
If you are going to run on a container, don't forget to expose and bind a port to the container. The default port used by the container is 3000, so you could use docker container run -p 80:3000 wandsilva/go-account-service-server:1.0.0.
It's a simple app for studies purposes only, so it has only one valid endpoint.
GET on /accounts/123456