build: add Makefile

Makefile

@@ -0,0 +1,29 @@
+GOCMD := go
+GOFMT := ${GOCMD} fmt
+GOMOD := ${GOCMD} mod
+
+## help:			print this help message
+.PHONY: help
+help: Makefile
+	# autogenerate help messages for comment lines with 2 `#`
+	@sed -n 's/^##//p' $<
+
+## tidy:			tidy modules
+tidy:
+	${GOMOD} tidy
+
+## fmt:			apply go code style formatter
+fmt:
+	${GOFMT} -x ./...
+
+## lint:			run linters
+lint:
+	golangci-lint run
+	nilaway ./...
+
+## binary:		build a binary
+binary: fmt tidy lint
+	goreleaser build --clean --single-target --snapshot --output .
+
+## build:			alias for `binary`
+build: binary