chore: reduce docker image size

Author: go-bai

Dockerfile

@@ -8,9 +8,8 @@ RUN go mod tidy && go build -ldflags "-s -w" -o main
 
 
 FROM scratch
-COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=builder /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
 COPY --from=builder /build/conf conf
 COPY --from=builder /build/main /
-ENV TZ=Asia/Shanghai
 
 ENTRYPOINT ["/main"]