PJディレクトリの中身をapp直下に入れて、Dockerfileと同階層にする

[miolab]

なぜやるのか

heroku.yml設定の都合上

実装手順（案）

• [x] docker-compose.yml 書き直し

  command:
  - sh -c "cd ${PROJECT_NAME} && mix phx.server --no-halt"
  + sh -c "mix phx.server --no-halt"

• [x] rm -rf app/my_app

• [x] docker-compose build

• [x] ルートで docker-compose run --rm app mix phx.new . --app my_app --no-ecto

  Creating phoenix_dev_containers_no_ecto_app_run ... done
  The directory /usr/src/app already exists. Are you sure you want to continue? [Yn]  -->Y
  ...
  
  Fetch and install dependencies? [Yn]   -->Y
  * running mix deps.get
  * running mix deps.compile
  * running cd assets && npm install && node node_modules/webpack/bin/webpack.js --mode development
  
  We are almost there! The following steps are missing:
  
    $ cd app
  
  Start your Phoenix app with:
  
    $ mix phx.server
  
  You can also run your app inside IEx (Interactive Elixir) as:
  
    $ iex -S mix phx.server

• [x] docker-compose build

• [x] docker-compose up で起動確認

現状（旧）

$ tree . -L 3
.
├── app
│   ├── Dockerfile
│   └── my_app
│       ├── README.md
│       ├── _build
│       ├── assets
│       ├── config
│       ├── deps
│       ├── lib
│       ├── mix.exs
│       ├── mix.lock
│       ├── priv
│       └── test
├── docker-compose.yml
└── .envとか.gitignoreとか