Update Dockerfile

Author: git-hulk

Diff for: Dockerfile

@@ -8,6 +8,7 @@ RUN cd /lmstfy && make
 
 FROM ubuntu:20.04
 COPY --from=builder /lmstfy /lmstfy
+RUN apt update -y && apt install -y netcat
 EXPOSE 7777:7777
 ENTRYPOINT ["/lmstfy/_build/lmstfy-server", "-c", "/lmstfy/config/docker-image-conf.toml"]