hugo/docs/content/doc/configuration.md

{ "title": "Configuring Hugo", "Pubdate": "2013-07-01" }

The directory structure and templates provide the majority of the configuration for a site. In fact a config file isn't even needed for many websites since the defaults used follow commonly used patterns.

The following is an example of a config file with the default values

{
    "SourceDir" : "content",
    "LayoutDir" : "layouts",
    "PublishDir" : "public",
    "BuildDrafts" : false,
    "Tags" : { "category" : "categories", "tag" : "tags" },
    "BaseUrl"    : "http://yourSite.com/"
}