fixes can not execute

Dockerfile

@@ -2,9 +2,8 @@ FROM alpine:3.3
 
 USER root
 
-RUN apk -U upgrade && \
-    apk -U add --no-cache ca-certificates && \
-    update-ca-certificates
+RUN sed -i 's|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g' /etc/apk/repositories
+RUN apk add --no-cache ca-certificates curl
 
 COPY bin/wechat-backend wechat-backend
 

Makefile

 build:
-	env GOOS=linux go build -o bin/wechat-backend
+	CGO_ENABLED=0 GOOS=linux go build -ldflags "-w -s" -a -installsuffix cgo -o bin/wechat-backend
+	upx bin/wechat-backend
+
+build-local:
+	env go build -o bin/wechat-backend
 	upx bin/wechat-backend
 
 image: build