What is the name of your application container in your docker-compose? because I don't see any service that might be your application. if you want to create a docker image before start a container, you need to write your container configuration in your docker-compose, below is an example for golang application. I assume uwsgi,celery_worker,nginx,and redis is not your application.

version: '3'

services:
  # before this service you can add your dependencies like celery, redis, uwsgi
  asgpractice:
    container_name: asgpractice
    build:
      context: .
      dockerfile: ./Dockerfile
    image: asgpractice
    ports:
      - 3000:3000