Gorelaser files was developed to generate multiple binaries for the
application, and the travis file was modified to save the code coverage
and run Goreleaser.
add Makefile for local development
The Makefile was created to facilitate the local development when
we need to run tests and generate coverage files.
add application version
For the future version of the app and automatic builds, it is
important to has a version flag.
add go module file
A go.mod file was added to describe all the necessary dependencies
for the application.