old_contents: from rest_framework import serializers
  from .models import Runner, RunnerVersion
  
  
  class RunnerVersionSerializer(serializers.ModelSerializer):
      class Meta(object):
          model = RunnerVersion
          fields = ('version', 'url')
  
  
  class RunnerSerializer(serializers.ModelSerializer):
      versions = RunnerVersionSerializer(many=True)
  
      class Meta(object):
          model = Runner
          fields = ('name', 'slug', 'icon', 'website', 'versions')
  
new_contents: from rest_framework import serializers
  from .models import Runner, RunnerVersion
  
  
  class RunnerVersionSerializer(serializers.ModelSerializer):
      class Meta(object):
          model = RunnerVersion
          fields = ('version', 'architecture', 'url')
  
  
  class RunnerSerializer(serializers.ModelSerializer):
      versions = RunnerVersionSerializer(many=True)
  
      class Meta(object):
          model = Runner
          fields = ('name', 'slug', 'icon', 'website', 'versions')
  
subject: Add architecture to runner version serializer