mastaface/config.json.example

{
  "bridges": [
    {
    "facebook_page": "<the name of your facebook page>",
    "mastodon_access_token": "<your secret mastodon app token>",
    "mastodon_api_base_url": "<base url of your mastodon instance>"
    },
    {
    "facebook_page": "<the name of some other facebook page>",
    "mastodon_access_token": "<some other secret mastodon app token>",
    "mastodon_api_base_url": "<base url of the mastodon instance>"
    }
  ]
}