質問です。

DockerでRails + MySQLの開発環境をつくる手順
Quickstart: Compose and Rails
を見てここでも色々教えていただき

GCPでもdocker-composeできましたが

docker-compose run web rake db:create

docker-compose run web bin/rails g scaffold User name:string

docker-compose run web bundle exec rails db:migrate

の最後をしたところ

Creating network "root_default" with the default driver
Creating root_db_1 ...
Creating root_db_1 ... done
rake aborted!
Mysql2::Error: Authentication plugin 'caching_sha2_password' cannot be loaded: /usr/lib/mysql/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory
/usr/local/bundle/gems/mysql2-0.4.10/lib/mysql2/client.rb:89:in `connect'
/usr/local/bundle/gems/mysql2-0.4.10/lib/mysql2/client.rb:89:in `initialize'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/mysql2_adapter.rb:21:in `new'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/mysql2_adapter.rb:21:in `mysql2_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:759:in `new_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:803:in `checkout_new_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:782:in `try_to_checkout_new_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:743:in `acquire_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:500:in `checkout'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:931:in `retrieve_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_handling.rb:116:in `retrieve_connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/connection_handling.rb:88:in `connection'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/schema_migration.rb:20:in `table_exists?'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/schema_migration.rb:24:in `create_table'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/migration.rb:1125:in `initialize'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/migration.rb:1007:in `new'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/migration.rb:1007:in `up'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/migration.rb:985:in `migrate'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/tasks/database_tasks.rb:171:in `migrate'
/usr/local/bundle/gems/activerecord-5.1.4/lib/active_record/railties/databases.rake:58:in `block (2 levels) in <top (required)>'
/usr/local/bundle/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

のエラーがでるのですが....
最後の部分教えてください。
よろしくお願いします。