Platform Unsupported Error, TravisCI Does Not Work

language:ruby
os —linux
dist —xenial
sudo —true
services:docker

before_install:
  - docker-compose up --build-d

script:
  - docker-compose exec -- env'RAILS_ENV = test' web rails db:create
  - docker-compose exec -- env'RAILS_ENV = test' web rails db:migrate
  - docker-compose exec -- env'RAILS_ENV = test' web rails db:seed
  - docker-compose exec -- env'RAILS_ENV = test' web rails test

 FROM ruby: 2.6.5

RUN apt-get update & apt-get install-y curlapt-transport - https wget & \
curl-sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add-&&\
echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list & \
apt-get update & apt-get install-yarn

RUN apt-get update-qq & apt-get install-y nodejs yarn
RUN mkdir/bridge_app
WORKDIR/fridge_app
COPY Gemfile Gemfile.lock/bridge_app/
ENV BUNDLER_VERSION 2.1.4
RUNgem update --system\
    &gem install bundleer-v$BUNDLER_VERSION\
    & bundle install-j4
COPY./bridge_app

RUN yarn install --check-files
RUN bundle exec rails webpacker:install

ENV PATH $PATH: /usr/local/src/bin

COPY entrypoint.sh/usr/bin/
RUN chmod+x/usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000

CMD ["rails", "server", "-b", "0.0.0.0" ]

version: '3'
services:
  db:
    image:mysql:5.6
    platform —linux/amd64
    environment:
      MYSQL_ROOT_PASSWORD:password
      MYSQL_DATABASE:root
    ports:
      - "3306:3306"
    volumes:
      - ./tmp/db:/var/lib/mysql

  web:
    build:.
    environment:
      region —ap-northeast-1
      AWS_ACCESS_KEY_ID: $AWS_ACCESS_KEY_ID
      AWS_SECRET_ACCESS_KEY: $AWS_SECRET_ACCESS_KEY
    command:bash-c "rm-ftmp/pids/server.pid & bundle exec rails s-p 3000-b '0.0.0'"
    volumes:
      - .:/bridge_app
    ports:
      - "3000:3000"
    depend_on:
      - db