add Makefile for build automation

.gitignore

@@ -25,3 +25,4 @@ go.work.sum
 # env file
 .env
 
+build

Makefile

@@ -0,0 +1,11 @@
+BINARY = termbox
+GO_ENV = GOOS=linux GOARCH=amd64
+
+.PHONY: build clean
+all: build
+
+build: clean
+	go build -o build/${BINARY} cmd/termbox/main.go
+
+clean:
+	rm -rf build

cmd/termbox/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, Termbox!")
+}