How to use the celebrate.Joi.number function in celebrate

var router = require("express").Router();
const { celebrate, Joi } = require("celebrate");

// Corresopnds to a GET request to /api/sample/
router.get(
  "/",
  celebrate({
    body: Joi.object().keys({
      name: Joi.string().required(),
      age: Joi.number().integer(),
      role: Joi.string().default("admin")
    })
  }),
  function(req, res) {
    console.log("HI");
    res.send("Hello world!");
  }
);

router.post(
  "/signup",
  celebrate({
    body: Joi.object().keys({
      name: Joi.string().required(),
      age: Joi.number().integer(),
      role: Joi.string().default("admin")

const resources = await Resource.find({});
    res.json({
      code: 200,
      result: resources,
      success: true
    });
  })
);

// get list of resources filtered by location radius
router.get(
  "/filter",
  requireVolunteerStatus,
  celebrate({
    query: {
      radius: Joi.number(),
      address: Joi.string(),
      keyword: Joi.string(),
      customWeights: Joi.array(),
      tag: Joi.string()
    }
  }),
  errorWrap(async (req, res) => {
    const { radius, address, keyword, customWeights, tag } = req.query;
    let resources = await Resource.find({});

    const latlng = await resourceUtils.addressToLatLong(address);
    const lat = latlng.lat;
    const long = latlng.lng;

    if (radius && lat && long) {
      const radiusOfEarth = 3963.2; // in miles

router.put(
  "/:resource_id",
  requireAdminStatus,
  celebrate({
    body: Joi.object().keys({
      companyName: Joi.string(),
      contactName: Joi.string(),
      contactPhone: Joi.string(),
      contactEmail: Joi.string(),
      description: Joi.string(),
      address: Joi.string(),
      location: Joi.object({
        type: Joi.string().default("Point"),
        coordinates: Joi.array()
          .length(2)
          .items(Joi.number())
      }),
      notes: Joi.string(),
      tags: Joi.array().items(Joi.string())
    }),
    params: {
      resource_id: Joi.objectId().required()
    }
  }),
  errorWrap(async (req, res) => {
    const data = req.body;
    const resourceId = req.params.resource_id;

    const resource = await Resource.findByIdAndUpdate(
      resourceId,
      { $set: data },
      { new: true }