Sample API call successfully retrieves all DB data. Next step is retrieving by ID

controller.js

//ROUTER

const router = require('express').Router();
const controller = require('./controller.js');

router.get('/findAll', controller.get);

module.exports = router;

//CONTROLLER
const path = require('path');
const findAllProducts = require(path.join(__dirname, 'db', 'productsdb.js')).findAllProducts;


let controller = {
  get: (req, res) => {
    findAllProducts((err, results) => {
      if (err) {
        console.log(err);
        res.sendStatus(500);
      } else {
        res.json(results);
      }
    });
  },
};
module.exports = controller;


//OUTPUT - SHORT SAMPLE OF OUTPUT OF ALL DATA

[{
    "zip": [
        94747,
        94687,
        94166,
        94383,
        94648,
        94491,
        94203,
        94325,
        94149,
        94596,
        94017,
        94152,
        94374,
        94964,
        94268,
        94656,
        94167,
        94804,
        94109
    ],
    "_id": "5eace4c4d5c7ef4196fe17a0",
    "recommended": [
        {
            "_id": "5eace4c4d5c7ef4196fe17a1",
            "name": "Cargo Fire Pants",
            "price": 48,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+1.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a2",
            "name": "Utilitarian NyCo Pants",
            "price": 50.67,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+1.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a3",
            "name": "Futuristic Heat-tech Pants",
            "price": 17.18,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+3.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a4",
            "name": "Parachute NyCo Pants",
            "price": 24,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+5.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a5",
            "name": "Technical Cargo Goretex Pants",
            "price": 70.08,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+2.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a6",
            "name": "Multi-purpose Goretex Pants",
            "price": 43.69,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+6.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a7",
            "name": "Cargo Heat-tech Pants",
            "price": 31.92,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+8.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a8",
            "name": "Utilitarian NyCo Pants",
            "price": 61.75,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+6.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17a9",
            "name": "Cargo Goretex Pants",
            "price": 43.67,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+8.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17aa",
            "name": "Utility NyCo Pants",
            "price": 3.44,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+5.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17ab",
            "name": "Technical Cargo Heat-tech Pants",
            "price": 20.48,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+1.jpg"
        }
    ],
    "productId": 4,
    "price": 72.02,
    "image": "https://targetrecombucket.s3-us-west-1.amazonaws.com/PANTS+2.jpg",
    "__v": 0
},
{
    "zip": [
        94920,
        94676,
        94444,
        94997,
        94867,
        94693,
        94289,
        94766,
        94587,
        94626,
        94046,
        94244,
        94729,
        94997,
        94070,
        94906,
        94632,
        94874,
        94083,
        94163,
        94467,
        94857,
        94308,
        94850,
        94021,
        94205,
        94524,
        94510,
        94858,
        94434,
        94409,
        94834,
        94894,
        94470,
        94812,
        94576,
        94464,
        94226,
        94671,
        94557,
        94518,
        94615,
        94102,
        94045,
        94724,
        94125,
        94212,
        94008,
        94734
    ],
    "_id": "5eace4c4d5c7ef4196fe17ac",
    "recommended": [
        {
            "_id": "5eace4c4d5c7ef4196fe17ad",
            "name": "Silver Anti-Bacterial Cotton Noragi",
            "price": 35.22,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/NORAGI+1.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17ae",
            "name": "Technical Jersey Noragi",
            "price": 35.45,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/NORAGI+4.jpg"
        },
        {
            "_id": "5eace4c4d5c7ef4196fe17af",
            "name": "Functional Ripstop Noragi",
            "price": 48.93,
            "recImage": "https://targetrecombucket.s3-us-west-1.amazonaws.com/NORAGI+6.jpg"
        }
    ],
    "productId": 5,
    "price": 67.68,
    "image": "https://targetrecombucket.s3-us-west-1.amazonaws.com/NORAGI+3.jpg",
    "__v": 0
}]