npm ERR! missing script: start when running docker compose up

I am trying to run mongodb with a Node.js app on a docker container. However, every time I run the docker compose up command, I receive the following error:

>npm ERR! missing script: start

Here is my Dockerfile:

FROM node:8.11-slim
WORKDIR /usr/src/app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 5500

CMD ["npm","start"]

Here is my docker-compose.yml file:

version: '3'
services:
  app:
    container_name: ians-mongo
    restart: always
    build: ./vidly
    ports:
      - '5500:5500'
    external_links:
      - mongo

  mongo:
    container_name: mongo
    image: mongo
    volumes:
      - ./data:/data/db
    ports:
      - '27012:27017'

  mongo-express:
    container_name: mongo-express
    image: mongo-express
    ports:
      - '8083:8081'

And here is my package.json:

{
  "name": "vidly",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "nodemon index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "config": "^3.3.9",
    "debug": "^4.3.4",
    "express": "^4.18.2",
    "helmet": "^7.0.0",
    "joi": "^17.9.2",
    "morgan": "^1.10.0"
  },
  "devDependencies": {
    "nodemon": "^2.0.22"
  }
}

Here is a screenshot of my folder structure:

I'm wondering if it has something do with the dockerfile not being able to find the package.json file, or possibly the value for the build property in the yml file being incorrect.

You should change the build statement for your app in the docker-compose file. It is currently looking at a "vidly" subdirectory, that doesn't exist in your screenshot. You could add a dockerfile statement which would make sure the correct dockerfile is seen.

version: '3'
services:
  app:
    container_name: ians-mongo
    restart: always
    build: 
      context: .
      dockerfile: ./Dockerfile
    ports:
      - '5500:5500'
    external_links:
      - mongo

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