base alpine for shell over scratch

Dockerfile

@@ -4,7 +4,8 @@ COPY . /go/src/app
 WORKDIR /go/src/app
 RUN GOOS=linux CGO_ENABLED=0 go build -o /bin/app -a -installsuffix cgo -trimpath -ldflags "-s -w" -tags musl
 
-FROM scratch
+FROM alpine
+RUN apk update && apk --no-cache upgrade
 COPY --from=builder /bin/app /bin/
 CMD []
 ENTRYPOINT ["/bin/app"]