add Makefile

server/Makefile

+.PHONY: all build run gotool clean help
+
+BINARY="server"
+GVA = "gva"
+
+all: check gva initdb run
+
+gva:
+	go build -o ${GVA} cmd/main.go
+
+initdb:
+	@if [ -f ${GVA} ] ; then ./gva initdb && rm ${GVA} ; fi
+
+linux-build:
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build
+
+windows-build:
+	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o ${BINARY}.exe
+
+mac-build:
+	CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o ${BINARY}
+
+run:
+	@go run main.go
+
+check:
+	go fmt ./
+	go vet ./
+
+clean:
+	@if [ -f ${BINARY} ] ; then rm ${BINARY} ; fi
+	@if [ -f ${GVA} ] ; then rm ${GVA} ; fi
+
+help:
+	@echo "make - 格式化 Go 代码, 并编译生成二进制文件"
+	@echo "make linux-build - 编译 Go 代码, 生成Linux系统的二进制文件"
+	@echo "make windows-build - 编译 Go 代码, 生成Windows系统的exe文件"
+	@echo "make mac-build - 编译 Go 代码, 生成Mac系统的二进制文件"
+	@echo "make run - 直接运行 main.go"
+	@echo "make clean - 移除二进制文件"
+	@echo "make check - 运行 Go 工具 'fmt' and 'vet'"
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