first go to the gama folder :
  cd ./gamabuild your docker image
  docker build -t gama-headless .  docker run -p 6868:6868 gama-headless sh ./gama-headless.sh -socket 6868  cd ./lotka-volterrainstall all the dependencies
  npm installlaunch the web application (the headless server have to be launched first)
  npm run dev