docker: add basic documentation, fix broken env
docker: add basic documentation, fix broken env

williampma/relex,linas/relex,ainishdave/relex,rodsol/relex,leungmanhin/relex,williampma/relex,ainishdave/relex,rodsol/relex,leungmanhin/relex,AmeBel/relex,AmeBel/relex,ainishdave/relex,rodsol/relex,virneo/relex,opencog/relex,williampma/relex,ainishdave/relex,williampma/relex,virneo/relex,rodsol/relex,leungmanhin/relex,virneo/relex,linas/relex,opencog/relex,virneo/relex,opencog/relex,linas/relex,AmeBel/relex