compile swatplus on a docker container

I had some challenges building https://github.com/swat-model/swatplus on ubuntu, 
apt-get provides an older version of cmake.
So i started of with a docker image with a recent version of cmake, gfortran seems preinstalled.
not sure why, but when running bash on the image, I had to install cmake first...

local:

  docker run -it -v $(pwd):/work kitware/cmake:ci-debian12-x86_64-2025-03-31 bash


bash in container:

  apt update
  apt install cmake
  git config --global --add safe.directory /work
  cmake --version # requires 3.20+
  cmake -B build -D CMAKE_Fortran_COMPILER=gfortran
  cmake --build build
  ./build/swatplus-xxxx # to run it -> fails -> it needs some input files