Docker Create react app hot reload not working

Question

I'm trying to set a development environment in Docker with Create React App and Node js. but when I'm changing my code,it doesn't reload changes

Normally just using volumes would be enough, but I added also : CHOKIDAR_USEPOLLING=true in ENV as create react app official documentation says, and I moved my code to WSL since I'm on Windows 10 but still the same. I created a another project with create react app and I used docker with CHOKIDAR_USEPOLLING=true and works just fine, but when I added more services won't work anymore.

this is my docker-compose file.

version: '3.3'
services:
  backend:
    image: node
    build:
      context: ./salesbackend/
    ports: 
      - 5000:3001
    env_file: ./salesbackend/.env
    volumes:
      - ./salesbackend:/var/app/salesbackend
      - /var/app/salesbackend/node_modules
    depends_on: 
      - mongo
  frontstore:
    build:
      context: ./frontstore/
    ports:
      - 5001:3000
      - 5002:3003
    env_file: ./frontstore/.env
    environment:
      - NODE_ENV=development
      - CHOKIDAR_USEPOLLING=true
    volumes: 
      - ./frontstore:/var/app/frontstore
      - /var/app/frontstore/node_modules
    depends_on: 
      - backend
  frontend:
    build:
      context: ./frontend/
    ports:
      - 5003:4000
    env_file: ./frontend/.env
    environment:
      - NODE_ENV=development
      - CHOKIDAR_USEPOLLING=true
    volumes: 
      - ./frontend:/var/app/frontend
      - /var/app/frontend/node_modules

  mongo:
    image: mongo
    volumes: 
      - ./db/:/data/db
    ports:
      - 30000:27017

This is my Dockerfile for frontend service,

-> Frontend and Frontstore are both made in create react app and both aren't working.

FROM node:10
WORKDIR /var/app/
COPY package.json /var/app/package.json
RUN npm install

COPY . .

CMD ["npm","start"]

using docker-compose up works just fine, when I edit my backend that is build in NestJS, changes auto reloads, but for create-react-app not.

Answer 1

Fixed

This issue was in file Dockerfile The workdir was /var/app/ while in my docker-compose.yml I mounted current working directory to /var/app/frontend, I just removed that /frontend and works fine.