╭─○ yasulab ‹2.7.0› ~/coderdojo.jp
╰─○ be rails dojos:update_db_by_yaml
ruby/2.7.0 isn't supported by this pry-doc version
rails aborted!
Sprockets::Railtie::ManifestNeededError: Expected to find a manifest file in `app/assets/config/manifest.js`
But did not, please create this file and use it to link any assets that need
to be rendered by your app:

Example:
  //= link_tree ../images
  //= link_directory ../javascripts .js
  //= link_directory ../stylesheets .css
and restart your server
/Users/yasulab/coderdojo.jp/config/environment.rb:5:in `<main>'
bin/rails:4:in `<main>'
Tasks: TOP => dojos:update_db_by_yaml => environment
(See full trace by running task with --trace)