Files needed to run a container docker-compose command

Question

I think I have a bit of a hard time understanding what files do I need to be able to run a container with my Rails app on an empty instance.

I have a docker-compose.prod.yml that I want to run:

version: "3.8"

services:
  db:
    image: postgres
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-default}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-default}
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
  app:
    image: "username/repo:${WEB_TAG:-latest}"
    depends_on:
      - db
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec puma -C config/puma.rb"
    volumes:
      - .:/myapp
      - public-data:/myapp/public
      - tmp-data:/myapp/tmp
      - log-data:/myapp/log
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-default}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-default}
      POSTGRES_HOST: ${POSTGRES_HOST:-default}
  web:
    build: nginx
    volumes:
      - public-data:/myapp/public
      - tmp-data:/myapp/tmp
    ports:
      - "80:80"
    depends_on:
      - app
volumes:
  public-data:
  tmp-data:
  log-data:
  db-data:

So, in the instance, I have the docker-compose.prod.yml file. And since I am passing variables for the environments and the image web tag, I created an .env file with those variables in it as well. Finally, since I am building nginx, I have a folder with the image:

FROM arm64v8/nginx

# インクルード用のディレクトリ内を削除
RUN rm -f /etc/nginx/conf.d/*

# Nginxの設定ファイルをコンテナにコピー
ADD nginx.conf /etc/nginx/myapp.conf

# ビルド完了後にNginxを起動
CMD /usr/sbin/nginx -g 'daemon off;' -c /etc/nginx/myapp.conf

and config file nginx.conf

user  root;
worker_processes  1;

events{
    worker_connections  512;
}

# ソケット接続
http {
  upstream myapp{
    server unix:///myapp/tmp/sockets/puma.sock;
  }
  server { # simple load balancing
    listen 80;
    server_name localhost;

    #ログを記録しようとするとエラーが生じます
    #root /myapp/public;
    access_log /var/log/nginx/access.log;
    error_log  /var/log/nginx/error.log;

    location / {
      proxy_pass http://myapp;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
    }
  }
}

So, docker-compose.prod.yml, nginx directory with the 2 files and the .env file.

When I do: docker-compose -f docker-compose.prod.yml --env-file .env run app rake db:create db:migrate it downloads the postgres and app images but once it starts doing the rake for the db:create db:migrate, I get this error:

Status: Downloaded newer image for user/repo:48
Creating rails-app_db_1 ... done
Creating rails-app_app_run ... done
rake aborted!
No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)
/usr/local/bundle/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
(See full trace by running task with --trace)

but then when I add the Rakefile, it keeps asking for other dependents files so either I need the whole project itself (clone it from my repo on GitHub) or I am doing this wrong.

Any ideas on what files do I need or if I need to change commands are welcome! Thank you.