Error: Cannot find module 'mongoose'

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1 
C:\Users\HP\Desktop\nodeDocker>docker logs nodedocker_node-app_1

> nodeDocker@1.0.0 dev
> nodemon -L index.js

[nodemon] 2.0.12
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,json
[nodemon] starting `node index.js`
node:internal/modules/cjs/loader:927
  throw err;
  ^

Error: Cannot find module 'mongoose'
Require stack:
- /app/index.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:924:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:996:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (/app/index.js:2:18)
    at Module._compile (node:internal/modules/cjs/loader:1092:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1121:10)
    at Module.load (node:internal/modules/cjs/loader:972:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/app/index.js' ]
}
[nodemon] app crashed - waiting for file changes before starting...

I have two containers

C:\Users\HP\Desktop\nodeDocker>docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS          PORTS
       NAMES
d34a42bd5be5   nodedocker_node-app   "docker-entrypoint.s…"   15 minutes ago   Up 15 minutes   0.0.0.0:3000->3000/tcp, :::3000->3000/tcp   nodedocker_node-app_1
b026aa82c85b   mongo                 "docker-entrypoint.s…"   15 minutes ago   Up 15 minutes   27017/tcp
       nodedocker_mongo_1

But could’n find the error where did wrong!!

package.json

{
  "name": "nodeDocker",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "dev": "nodemon -L index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1",
    "mongoose": "^6.0.7"
  },
  "devDependencies": {
    "nodemon": "^2.0.13"
  }
}

index.js

const express = require("express");
const mongoose = require("mongoose");

const app = express();

mongoose
.connect("...........")
.then(()=>console.log("Successfully connected to DB"))
.catch((e)=>console.log(e));
const port = process.env.PORT || 3000;

app.get("/", (req, res)=>{
res.send("<h2>Hi There!</h2>");
});

app.listen(port, ()=>{
console.log(`Listening on port ${port}`)
});

Dockerfile

FROM node:15
WORKDIR /app
COPY package.json .
RUN npm install
ARG NODE_ENV
RUN if [ "$NODE_ENV" = "development" ]; \
    then npm install; \
    else npm install --only-production; \
    fi
COPY . ./
ENV PORT 3000
EXPOSE $PORT
CMD ["node", "index.js"]

docker-compose.dev.yml

version: "3"
services:
  node-app:
    build:
      context: .
      args:
        NODE_ENV: development
    volumes:
      - ./:/app
      - /app/node_modules
    environment:
      - NODE_ENV=development
    command: npm run dev

docker-compose.yml

version: "3"
services:
  node-app:
    build: .
    ports:
      - "3000:3000"
    environment:
      - PORT=3000

  mongo:
    image: mongo
    environment:
      MONGO_INITDB_ROOT_USERNAME: <I didnt put here>
      MONGO_INITDB_ROOT_PASSWORD: <i didn put here>
    volumes:
      - mongo-db:/data/db

volumes:
  mongo-db: