Error deploying rails5 + Mysql to heroku with Docker-compose

udemy here https://www.udemy.com/course/rails-kj/ Learning

[SNS bulletin board app] (https://github.com/kkoji/rails-lecture/tree/current_user_method) I am allowed to make.

Rails 5 series Ruby 2.4.5 mysql2

Finally I'm trying to deploy to heroku

Until you deploy Rails on Docker on Heroku I'm stuck trying to use MySQL on Heroku Refer to, try

As a flow, Add clearDB as an add-on Set in config (change to mysql2) heroku CLI login Log in to heroku container heroku create~~ heroku container:push web heroku container:release web heroku run rails db:migrate heroku open heroku run rails assets:precompile heroku config:add RAILS_ENV=production (I don't understand the asset pipeline)

However, I got an Application error on heroku open and at heroku logs --tail

2020-08-31T00:05:17.338031+00:00 app[api]: Deployed web (09d5e5e0baba) by user [email protected]
2020-08-31T00:05:17.338031+00:00 app[api]: Release v14 created by user [email protected]
2020-08-31T00:05:17.566831+00:00 heroku[web.1]: State changed from crashed to starting
2020-08-31T00:05:33.102257+00:00 app[api]: Starting process with command `rails db:migrate` by user [email protected]
2020-08-31T00:05:41.271963+00:00 heroku[web.1]: Starting process with command `irb`
2020-08-31T00:05:44.759411+00:00 app[web.1]: Switch to inspect mode.
2020-08-31T00:05:44.760171+00:00 app[web.1]: 
2020-08-31T00:05:44.815317+00:00 heroku[web.1]: Process exited with status 0
2020-08-31T00:05:44.849695+00:00 heroku[web.1]: State changed from starting to crashed
2020-08-31T00:05:44.852418+00:00 heroku[web.1]: State changed from crashed to starting
2020-08-31T00:05:52.851790+00:00 heroku[run.7980]: State changed from starting to up
2020-08-31T00:05:52.856447+00:00 heroku[run.7980]: Awaiting client
2020-08-31T00:05:52.891424+00:00 heroku[run.7980]: Starting process with command `rails db:migrate`
2020-08-31T00:05:59.894902+00:00 heroku[run.7980]: Process exited with status 0
2020-08-31T00:05:59.927380+00:00 heroku[run.7980]: State changed from up to complete
2020-08-31T00:06:05.419295+00:00 heroku[web.1]: Starting process with command `irb`
2020-08-31T00:06:08.786074+00:00 app[web.1]: Switch to inspect mode.
2020-08-31T00:06:08.786799+00:00 app[web.1]: 
2020-08-31T00:06:08.879555+00:00 heroku[web.1]: Process exited with status 0
2020-08-31T00:06:08.991140+00:00 heroku[web.1]: State changed from starting to crashed
2020-08-31T00:09:58.194158+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=glacial-temple-79557.herokuapp.com request_id=432296e9-7359-4456-bbc2-b885e514a27d fwd="111.97.175.96" dyno= connect= service= status=503 bytes= protocol=https
2020-08-31T00:09:59.223351+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=glacial-temple-79557.herokuapp.com request_id=12c8e692-769d-45a7-9967-ce77256746eb fwd="111.97.175.96" dyno= connect= service= status=503 bytes= protocol=https

It came out.

further, heroku run rails console c

Running via Spring preloader in process 18
WARNING: Spring is running in production. To fix this make sure the spring gem is only present in `development` and `test` groups in your Gemfile and make sure you always use `bundle install --without development test` in production
Loading production environment (Rails 5.0.7.2)

for that reason, Change bundle install with Dockerfile

FROM ruby:2.4.5
RUN apt-get update -qq && apt-get install -y build-essential nodejs
RUN mkdir /app
WORKDIR /app
COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install --without development test
COPY . /app

I rewrote it, but it didn't heal.

Hmmm weak ...

Below Docker-compose.yml

Docker-compose.yml

version: '3'
services:
  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/app
    ports:
      - 3000:3000
    depends_on:
      - db
    tty: true
    stdin_open: true
  db:
    image: mysql:5.7
    volumes:
      - db-volume:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: password
volumes:
  db-volume: