build: support multi-platform image

Dockerfile

@@ -1,12 +1,12 @@
-FROM golang:1.23-alpine3.20@sha256:9dd2625a1ff2859b8d8b01d8f7822c0f528942fe56cfe7a1e7c38d3b8d72d679 AS builder
+FROM golang:1.23-alpine AS builder
 RUN go env -w GO111MODULE=on GOPROXY=https://goproxy.cn,direct
 WORKDIR /app
 COPY ./go.mod ./go.sum ./
 RUN go mod download
 COPY ./ ./
 RUN CGO_ENABLED=0 go build -o ./target/http ./cmd/http && CGO_ENABLED=0 go build -o ./target/cron ./cmd/cron
 
-FROM alpine:3.20@sha256:beefdbd8a1da6d2915566fde36db9db0b524eb737fc57cd1367effd16dc0d06d
+FROM alpine
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories && \
     apk add --no-cache tzdata && \
     ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \

Makefile

@@ -2,10 +2,9 @@ registry = my.registry.host/my_repo_name
 project = my_project_name
 image = ${registry}/${project}
 
-version ?=
+version ?= latest
 env ?= production
-arch = amd64
-tag = ${version}-${env}-${arch}
+tag = ${version}-${env}
 
 table ?=
 model ?=
@@ -25,7 +24,7 @@ endif
 	@echo image tag: ${tag}
 
 image: check
-	docker buildx build --platform=linux/amd64 --build-arg PUBLISH_MODE=${env} -t ${image}:${tag} .
+	docker buildx build --platform linux/amd64,linux/arm64 --build-arg PUBLISH_MODE=${env} -t ${image}:${tag} .
 
 push: check
 	docker push ${image}:${tag}