create mongo conection of import

db/index.ts

@@ -5,24 +5,15 @@ import { getBookedDays as calendarGetBookedDays } from '../lib/googlecalendar'
 import { BOOKING_STATUS } from './enums'
 import { uniqueFilter } from '../helpers/array'
 
-let connectedPromise: Promise<mongoose.Mongoose>
-
 export const MONGO_URI = process.env.MONGO_URI
 
-export function connect(): Promise<mongoose.Mongoose> {
-  if (connectedPromise) {
-    return connectedPromise
-  }
-
-  connectedPromise = mongoose.connect(process.env.MONGO_URI)
-
-  return connectedPromise
-}
+mongoose.connect(process.env.MONGO_URI, {
+  serverSelectionTimeoutMS: 3000,
+})
 
 export async function getBookedDays(
   uuidsToIngore?: string[]
 ): Promise<string[]> {
-  await connect()
   const bookedInDatabase = await BookingModel.findBookedDays(uuidsToIngore)
   const bookedInCalendar = await calendarGetBookedDays()
 
@@ -30,7 +21,6 @@ export async function getBookedDays(
 }
 
 export async function getBookingByUUID(uuid: string): Promise<BookingDocument> {
-  await connect()
   return BookingModel.findOne({ uuid })
 }
 
@@ -40,7 +30,6 @@ export async function getBookings({
 }: { status?: BOOKING_STATUS[]; startDateGreaterThan?: string } = {}): Promise<
   BookingDocument[]
 > {
-  await connect()
   return await BookingModel.find({
     status: { $in: status },
     startDate: { $gte: startDateGreaterThan },
@@ -62,7 +51,6 @@ export async function createBooking({
   zip,
   city,
 }: Booking): Promise<Booking> {
-  await connect()
   const booking = new BookingModel({
     startDate,
     endDate,
@@ -85,7 +73,6 @@ export async function patchBooking(
   bookingUUID: string,
   bookingData: Booking
 ): Promise<{ current: Booking; previous: Booking }> {
-  await connect()
   const booking = await getBookingByUUID(bookingUUID)
   const oldBooking = booking.toJSON<Booking>()
   booking.set(bookingData)
@@ -98,7 +85,6 @@ export async function createBill(
   bookingUUID: string,
   billData: Bill
 ): Promise<Bill> {
-  await connect()
   const booking = await getBookingByUUID(bookingUUID)
 
   const bill = new BillModel()
@@ -116,7 +102,6 @@ export async function patchBill(
   bookingUUID: string,
   billData: Bill
 ): Promise<Bill> {
-  await connect()
   const booking = await getBookingByUUID(bookingUUID)
   const bill =
     (booking.bill && (await BillModel.findById(booking.bill))) ||