mayra-cabrera: Add main.go file
mayra-cabrera: Add main.go file

For Gophercon contributing workshop

Change-Id: I7f804551ef9ae489e65ee7bfa89beef29b505c45
Reviewed-on: https://go-review.googlesource.com/48956
Reviewed-by: Kevin Burke <685caccd7011cfe58b8f9ef79ff9dca388f03c79@inburke.com>

golang/scratch