Im getting this errror:
- Error parsing config file: yaml: line 1: mapping values are not allowed in this context
 - Cannot find a job named 
buildto run in thejobs:section of your configuration file.
If you expected a workflow to run, check your config contains a top-level key called ‘workflows:’ 
My yaml file:
  references:
  working_directory: &working_directory ~/code
  images: base_image: &base_image
  environment:
    BUNDLE_JOBS: 4
    BUNDLE_RETRY: 3
    BUNDLE_PATH: vendor/bundle
    RAILS_ENV: test
    CC_TEST_REPORTER_ID: eab6dc27076d631b996f74bd7c58709ff5c707926a20e1b23a8433c5b8462bac
    RAILS_DATABASE_HOST: localhost
db_image: &db_image
  image: circleci/postgres:9.6-alpine
  environment:
    POSTGRES_DB: myapp_test
    POSTGRES_USER: postgres
    POSTGRES_PASSWORD: ""
version: 2
jobs:
  build:
working_directory: *working_directory
docker:
  - *base_image
  - image: circleci/php:7.1.9-browsers
  
steps:
  - checkout
  - run:
      name: Setup dependencies
      command: |
        sudo composer self-update
        composer install -n --prefer-dist
  - run:
      name: Setup Code Climate test-reporter
      command: |
        curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
        chmod +x ./cc-test-reporter
  - run:
      name: Run tests
      command: |
        sudo docker-php-ext-enable xdebug
        ./cc-test-reporter before-build
        sudo vendor/bin/phpunit --coverage-clover clover.xml
        ./cc-test-reporter after-build --coverage-input-type clover --exit-code $?
  - restore_cache:
      name: Restore bundle cache
      keys:
        - rails-bundle-v1-{{ checksum ".ruby-version" }}-{{ checksum "Gemfile.lock" }}
        - rails-bundle-v1-{{ checksum ".ruby-version" }}-
  - run:
      name: Bundle Install
      command: bundle check || bundle install --clean
  - save_cache:
      name: Store bundle cache
      key: rails-bundle-v1-{{ checksum ".ruby-version" }}-{{ checksum "Gemfile.lock" }}
      paths:
        - vendor/bundle
  - restore_cache:
      name: Restore yarn cache
      keys:
        - rails-yarn-v1-{{ checksum "yarn.lock" }}
        - rails-yarn-v1-
  - run:
      name: Yarn Install
      command: yarn check || yarn install
  - save_cache:
      name: Store yarn cache
      key: rails-yarn-v1-{{ checksum "yarn.lock" }}
      paths:
        - node_modules
  - persist_to_workspace:
      root: *working_directory
      paths:
        - ./*
  test:
working_directory: *working_directory
docker:
  - *base_image
  - *db_image
steps:
  - attach_workspace:
      at: *working_directory
  - run:
      name: Wait for DB
      command: dockerize -wait tcp://localhost:5432 -timeout 1m
  - run:
      name: Database setup
      command: bin/rails db:schema:load --trace
  - type: shell
    command: |
      bundle exec rspec --profile 10 \
                        --format RspecJunitFormatter \
                        --out test_results/rspec.xml \
                        --format progress \
                        $(circleci tests glob "spec/**/*_spec.rb" | circleci tests split --split-by=timings)
  - store_test_results:
      path: test_results
  lint:
working_directory: *working_directory
docker:
  - *base_image
steps:
  - attach_workspace:
      at: *working_directory
  - run:
      name: bundle exec brakeman --exit-on-warn
      command: bundle exec brakeman --exit-on-warn
  - run:
      name: bundle exec danger
      command: bundle exec danger
      environment:
          LINT_OUTPUT: "lint_output"
  - store_artifacts:
      path: lint_output
      destination: lint_output
workflows:
  version: 2
  build_and_deploy:
jobs:
  - build
  - test:
      requires:
        - build
  - lint:
      requires:
        - build