template.yaml

Resources:
  # ...
  HelloWorldFunction:
    Type: AWS::Serverless::Function
    Properties:
      # ...
      Events:
        FindApi:
          Type: Api
          Properties:
            # this is all that needs to be added
            # reference the explicit API to merge this path/method into
            RestApiId: !Ref Api
            Path: /find
            Method: GET