var copy = require('couchdb-to-S3');

var db = {
    url: "http://localhost:5984",
    name: "the name of your database"
};

var aws = {
    accessKeyId: <aws_access_key_id>,
    secretAccessKey: <aws_secret_access_key>,
    bucket: "your S3 bucket",
};

copy(db, aws, function (err, body) {
    // ...
});