Update Dockerfile

Dockerfile

@@ -1,28 +1,13 @@
-FROM golang:1-alpine as builder
-
-# RUN apk --no-cache --no-progress add git ca-certificates tzdata make \
-#    && update-ca-certificates \
-#    && rm -rf /var/cache/apk/*
-
-WORKDIR /go/whoami
-
-# Download go modules
-COPY go.mod .
-COPY go.sum .
-
-RUN go env -w GOPROXY=https://goproxy.cn,direct
-# RUN GO111MODULE=on GOPROXY=https://proxy.golang.org go mod download
+FROM golang:alpine as builder
 
+WORKDIR /app
 COPY . .
 
-RUN make build
+RUN go env -w GOPROXY=https://goproxy.cn,direct
+RUN go mod tidy
+RUN go build -o whoami
 
-# Create a minimal container to run a Golang static binary
 FROM scratch
-
-COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
-COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=builder /go/whoami/whoami .
-
+COPY --from=builder /app/whoami .
 ENTRYPOINT ["/whoami"]
 EXPOSE 80