build: Added release building

Author: betapictoris

Makefile

@@ -8,5 +8,14 @@ usrinstall: build
 install: build
 	install -Dt /usr/local/bin -m 755 ./build/grave
 
+release:
+	GOOS=windows GOARCH=amd64 go build -o ./build/grave.exe ./cmd/main.go
+	GOOS=windows GOARCH=386 go build -o ./build/grave-x86.exe ./cmd/main.go
+	GOOS=darwin GOARCH=amd64 go build -o ./build/grave.darwin ./cmd/main.go
+	GOOS=darwin GOARCH=arm64 go build -o ./build/grave-arm64.darwin ./cmd/main.go
+	GOOS=linux GOARCH=amd64 go build -o ./build/grave ./cmd/main.go
+	GOOS=linux GOARCH=arm64 go build -o ./build/grave-arm64 ./cmd/main.go
+	GOOS=linux GOARCH=386 go build -o ./build/grave-x86 ./cmd/main.go
+
 clean:
 	rm -rf ./build/