OpenAPI YAML solution

api_spec.yaml

openapi: 3.0.2

info:
  title: Challenge 5
  description: challenge 5 solution
  version: 0.0.1

paths:
  "/challenge_info":
    get:
      operationId: "api.endpoints.challenge_info"
      responses:
        '200':
          description: "example solution"
          content:
            application/json:
              schema:
                type: object
                properties:
                  challenge_number:
                    type: integer
                    example: 5
                  challenge_topic:
                    type: string
                    example: "OpenAPI"