By default configuration file config.yml is loaded from current directory but you can use another using environment variable GNCGQL_CONF. See config.yml.template for more details.
~> export GNCGQL_CONF=/path/to/my/config.yml
~> ./gnucash-graphql
When is started, we can get some informations about the server using command:
~> curl -s localhost:3000 | python -m json.tool