🔨 Update development scripts.

Makefile

@@ -2,18 +2,25 @@
 GO_MAIN=./cmd/tld/tld.go
 GO_TEST=./test
 
+## install: Install missing dependencies.
 install:
 	go install $(GO_MAIN)
 
+## Run application.
 run:
 	go run $(GO_MAIN)
 
+## Build application.
 build:
 	go build $(GO_MAIN)
 
+## Run units tests.
 test:
-	go test ${GO_TEST}
+	go test $(GO_TEST)
 
+## Format code style.
 format:
 	go fmt $(GO_MAIN)
 	go fmt $(GO_TEST)
+
+.PHONY: install run build test format

cmd/tld/tld.go

@@ -3,5 +3,6 @@ package main
 import "fmt"
 
 func main() {
+
 	fmt.Println("Hello, world.")
 }