Select default graphql endpoint more intelligently

[josh]

I don't like how the current config needs to mutate the ENV vars in order have getGraphQLProjectConfig work as expected. It would be nice if you could pass something to getGraphQLProjectConfig as a fallback like getGraphQLProjectConfig('production'). Even better would be avoiding a hard coded naming requirement and selecting the first endpoint by default. Often there will only be one, no need for anyone to have to configure a name in that case.

webpack-config-github/webpack.config.js

Lines 213 to 217 in 1ae512d

	// TODO: Investigate other ways set a default GRAPHQL_CONFIG_ENDPOINT_NAME
	// for getGraphQLProjectConfig without mutating the environment.
	if (!process.env['GRAPHQL_CONFIG_ENDPOINT_NAME']) {
	process.env['GRAPHQL_CONFIG_ENDPOINT_NAME'] = 'production'
	}