Попробуй $PWD/dkrdata/nginx.conf:/etc/nginx/nginx.conf
Error response from daemon: create dkrdata/nginx.conf: "dkrdata/nginx.conf" includes invalid characters for a local volume name, only "[a-zA-Z0-9][a-zA-Z0-9_.-]" are allowed. If you intended to pass a host directory, use absolute path.