This function will add a service to a node by installing the necessary dependencies and modifying the `bitcore-node.json` configuration.
## Start
This function will load a configuration file `bitcore-node.json` and instantiate and start a node based on the configuration.
## Find Config
This function will recursively find a configuration `bitcore-node.json` file in parent directories and return the result.
## Default Config
This function will return a default configuration with the default services based on environment variables, and will default to using the standard `~/.bitcoin` data directory.