build from alpine instead of scratch

Dockerfile

@@ -4,6 +4,6 @@ WORKDIR /root/
 COPY . /root/
 RUN go build -o /root/matrix-handler cmd/svr/main.go
 
-FROM scratch
+FROM alpine
 COPY --from=build /root/matrix-handler /bin/matrix-handler
 ENTRYPOINT ["/bin/matrix-handler"]