[Answered ]-Trying to run a container on docker but can not access the website of the application we created

As you copied the source folder(happy_traveller) in your docker file, you don’t need to run the cd command again, so the docker-compose file would look like this:

version: "2.12.2"

services:
  web:
    tty: true
    build:
      dockerfile: Dockerfile
      context: .
    command: bash -c "python manage.py runserver 0.0.0.0:8000 "
    ports:
      - 8000:8000
    restart: always