Fix: potential issue with "tar" (#283)

Author: faberga

Dockerfile

@@ -6,7 +6,7 @@ RUN apt update && \
     apt install -y build-essential wget git cmake m4 libgmp-dev file && \
     cd ~ && \
     wget https://www.shoup.net/ntl/ntl-11.4.1.tar.gz && \
-    tar xf ntl-11.4.1.tar.gz && \
+    tar --no-same-owner -xf ntl-11.4.1.tar.gz && \
     cd ntl-11.4.1/src && \
     ./configure SHARED=on NTL_GMP_LIP=on NTL_THREADS=on NTL_THREAD_BOOST=on && \
     make -j4 && \