db.dd.aggregate(
    [
        {
            $addFields : {
                startOfWeek : 1,
                currentDayOfWeek : {$dayOfWeek : "$date"},
                daysToMinus : { $subtract : [{$dayOfWeek : "$date"} , 1] },
                startOfThisWeek : { $subtract : [ "$date", {$multiply : [{ $subtract : [{$dayOfWeek : "$date"} , 1 ] }, 24, 60, 60, 1000 ]  } ] }
            }
        }
    ]
).pretty()