docker-composeのrailsアプリをherokuにデプロイした時にcode=H10 desc="App crashed" method=GET となる

Question

前提・実現したいこと

docker-composeのrailsアプリをherokuのcontainerレジストリにデプロイしたいと思っています。
しかし、以下のようなエラーが発生しています。
一応通常の手順通りにコマンドを実行していき、dbのmigrateも行いました。
ログを見てみてもそれらしきものはなく、何が原因なのか掴めていない状況です。
わかる方がいましたらコメントお願いします。

発生している問題・エラーメッセージ

2021-04-10T08:38:14.866470+00:00 app[api]: Initial release by user 
2021-04-10T08:38:14.866470+00:00 app[api]: Release v1 created by user 
2021-04-10T08:38:15.374186+00:00 app[api]: Release v2 created by user 
2021-04-10T08:38:15.374186+00:00 app[api]: Enable Logplex by user 
2021-04-10T08:43:01.930030+00:00 app[api]: Starting process with command `rails db:migrate` by user 
2021-04-10T08:43:02.631506+00:00 heroku[run.9051]: State changed from starting to up
2021-04-10T08:43:02.708923+00:00 heroku[run.9051]: Awaiting client
2021-04-10T08:43:02.930686+00:00 heroku[run.9051]: Starting process with command `rails db:migrate`
2021-04-10T08:43:07.310353+00:00 heroku[run.9051]: Process exited with status 127
2021-04-10T08:43:07.384386+00:00 heroku[run.9051]: State changed from up to complete
2021-04-10T08:46:01.253829+00:00 app[api]: Attach CLEARDB_DATABASE (@ref:cleardb-parallel-38092) by user 
2021-04-10T08:46:01.253829+00:00 app[api]: Running release v3 commands by user 
2021-04-10T08:46:01.269242+00:00 app[api]: @ref:cleardb-parallel-38092 completed provisioning, setting CLEARDB_DATABASE_URL. by user 
2021-04-10T08:46:01.269242+00:00 app[api]: Release v4 created by user 
2021-04-10T08:48:36.652913+00:00 app[api]: Release v5 created by user 
2021-04-10T08:48:36.652913+00:00 app[api]: Set DATABASE_URL config vars by user 
2021-04-10T08:48:55.000000+00:00 app[api]: Build started by user 
2021-04-10T08:49:56.937772+00:00 app[api]: Set LANG, RACK_ENV, RAILS_ENV, RAILS_LOG_TO_STDOUT, RAILS_SERVE_STATIC_FILES, SECRET_KEY_BASE config vars by user 
2021-04-10T08:49:56.937772+00:00 app[api]: Release v6 created by user 
2021-04-10T08:49:57.313661+00:00 app[api]: Deploy b095d0ac by user 
2021-04-10T08:49:57.313661+00:00 app[api]: Release v7 created by user 
2021-04-10T08:49:57.334484+00:00 app[api]: Scaled to console@0:Free rake@0:Free web@1:Free by user 
2021-04-10T08:49:59.967091+00:00 heroku[web.1]: Starting process with command `bin/rails server -p ${PORT:-5000} -e production`
2021-04-10T08:50:00.000000+00:00 app[api]: Build succeeded
2021-04-10T08:50:04.456443+00:00 heroku[web.1]: State changed from starting to up
2021-04-10T08:50:30.847797+00:00 app[api]: Release v8 created by user 
2021-04-10T08:50:30.847797+00:00 app[api]: Deployed web (fecedc33ba0b) by user 
2021-04-10T08:50:31.533711+00:00 heroku[web.1]: Restarting
2021-04-10T08:50:31.553765+00:00 heroku[web.1]: State changed from up to starting
2021-04-10T08:50:32.315348+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2021-04-10T08:50:32.365970+00:00 app[web.1]: => Booting Puma
2021-04-10T08:50:32.365991+00:00 app[web.1]: => Rails 5.0.7.2 application starting in production on http://0.0.0.0:36236
2021-04-10T08:50:32.365992+00:00 app[web.1]: => Run `rails server -h` for more startup options
2021-04-10T08:50:32.365992+00:00 app[web.1]: Puma starting in single mode...
2021-04-10T08:50:32.365993+00:00 app[web.1]: * Version 3.12.6 (ruby 2.6.6-p146), codename: Llamas in Pajamas
2021-04-10T08:50:32.365993+00:00 app[web.1]: * Min threads: 5, max threads: 5
2021-04-10T08:50:32.365994+00:00 app[web.1]: * Environment: production
2021-04-10T08:50:32.365994+00:00 app[web.1]: * Listening on tcp://0.0.0.0:36236
2021-04-10T08:50:32.365994+00:00 app[web.1]: Use Ctrl-C to stop
2021-04-10T08:50:32.365995+00:00 app[web.1]: - Gracefully stopping, waiting for requests to finish
2021-04-10T08:50:32.365995+00:00 app[web.1]: === puma shutdown: 2021-04-10 08:50:32 +0000 ===
2021-04-10T08:50:32.365996+00:00 app[web.1]: - Goodbye!
2021-04-10T08:50:32.365996+00:00 app[web.1]: Exiting
2021-04-10T08:50:32.414969+00:00 heroku[web.1]: Process exited with status 143
2021-04-10T08:50:58.244678+00:00 heroku[web.1]: Starting process with command `irb`
2021-04-10T08:51:01.712907+00:00 app[web.1]: Switch to inspect mode.
2021-04-10T08:51:01.714356+00:00 app[web.1]: 
2021-04-10T08:51:01.779739+00:00 heroku[web.1]: Process exited with status 0
2021-04-10T08:51:01.877862+00:00 heroku[web.1]: State changed from starting to crashed
2021-04-10T08:51:01.883684+00:00 heroku[web.1]: State changed from crashed to starting
2021-04-10T08:51:23.426891+00:00 heroku[web.1]: Starting process with command `irb`
2021-04-10T08:51:26.329990+00:00 app[web.1]: Switch to inspect mode.
2021-04-10T08:51:26.331194+00:00 app[web.1]: 
2021-04-10T08:51:26.447920+00:00 heroku[web.1]: Process exited with status 0
2021-04-10T08:51:26.547826+00:00 heroku[web.1]: State changed from starting to crashed
2021-04-10T08:51:28.209198+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/images" host=agile-wildwood-04301.herokuapp.com request_id=68352dc8-8ceb-4953-8930-b6bcec46e26a fwd="180.32.200.59" dyno= connect= service= status=503 bytes= protocol=https

該当のソースコード

FROM ruby:2.4.5
RUN apt-get update -qq && apt-get install -y build-essential nodejs mysql-client
RUN mkdir /app
WORKDIR /app
COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install
COPY . /app

version: '3'
services:
  web:
    build: .
    command: bundle exec rails s -p 3001 -b '0.0.0.0'
    volumes:
      - .:/app
    ports:
      - 3001:3001
    depends_on:
      - db
    tty: true
    stdin_open: true
  db:
    image: mysql:5.7
    volumes:
      - db-volume:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: hoge
volumes:
  db-volume: