Django problem cannot connect to PostgreSQL server in Docker container

I have this logs

2024-10-21 23:55:07 django.db.utils.OperationalError: connection to server at "localhost" (::1), port 5432 failed: Connection refused
2024-10-21 23:55:07     Is the server running on that host and accepting TCP/IP connections?
2024-10-21 23:55:07 connection to server at "localhost" (127.0.0.1), port 5432 failed: Connection refused
2024-10-21 23:55:07     Is the server running on that host and accepting TCP/IP connections?

but my PostgreSQL server is working proprely

there are my postgres logs

2024-10-21 23:50:15 2024-10-21 18:50:15.916 UTC [29] LOG:  database system was shut down at 2024-10-21 18:50:14 UTC
2024-10-21 23:50:15 2024-10-21 18:50:15.918 UTC [1] LOG:  database system is ready to accept connections

database setting inside django

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'pgdb',
        'USER': 'postgres',
        'PASSWORD': 'admin',
        'HOST': 'localhost',
        'PORT': '5432',
    }
}

compose file

version: '3.8'
services:
  web:
    build: .
    command: bash -c "python /app/manage.py migrate && python /app/manage.py runserver 0.0.0.0:8000"
    ports:
      - 8000:8000
    depends_on:
      - postgres
    volumes:
      - .:/app

  postgres:
    image: postgres:latest  
    environment:
      POSTGRES_DB: pgdb
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: admin
    ports:
      - "5433:5432"
    

dockerfile

FROM python:3.11

WORKDIR /app

COPY . /app

RUN pip install -r requirements.txt && pip install psycopg2-binary

COPY . . 

I want just run django server on docker, I have tried to run my friend's completed project also using docker, firstly the same error was thrown, but then it started working properly, I dont know what should I do

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