Closure example for go serve mux

To run:

 git clone https://github.com/guygrigsby/closure-example.git
 cd closure-example
 go run main.go

Endoint:

Method	endpoint
GET	/standard
GET	/closure

Example:

curl localhost:8080/standard

or

curl localhost:8080/closure

Excersises for the reader:

Introduce another fixed value to the closure that could be important to the business logic of an http handler. Examples:

• Pass is some config values.
  • A domain name
  • A list of users
• Pass in a data structure to emulate a database, a map for example To create and use a map in GO:

func main() {
   m := make(map[string]string)
   m["food"] = "burrito"

   println(m["food"]) // prints "burrito"
}