Update Dockerfile

Dockerfile

@@ -12,7 +12,7 @@ RUN apt-get update && apt-get install -y \
     libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm \
     libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev git-lfs  \
     ffmpeg libsm6 libxext6 cmake libgl1-mesa-glx \
-    nginx netcat \
+    nginx netcat-traditional \
     && rm -rf /var/lib/apt/lists/* \
     && git lfs install