add GMP lib

Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         g++-11 \
         googletest \
         libboost-all-dev \
+        libgmp-dev \
         libtbb-dev \
         lldb \
         make \

README.md

@@ -14,6 +14,7 @@ Included tools are:
 - VSCode [extension for lldb](https://github.com/vadimcn/vscode-lldb)
 - [CMake](https://cmake.org)
 - [Boost](www.boost.org)
+- [GMP](https://gmplib.org)
 - [OneTBB](https://spec.oneapi.io/versions/latest/elements/oneTBB/source/nested-index.html)
 - [Valgrind](https://valgrind.org)
 - [GoogleTest](https://github.com/google/googletest)