This is the .gitignore I use for most of my conan-built executable projects:
CMakeCache.txt CMakeFiles/ Makefile bin/ cmake_install.cmake conan.lock conanbuildinfo.cmake conanbuildinfo.txt conaninfo.txt graph_info.json
It is debatable whether you should include lock files such as conan.lock. My opinion is that in the development phase they should be ignored but reconsidered when entering into production service.