AWS supports the following Ruby runtimes:

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Name | Identifier | SDK for Ruby | Operating system
-- | -- | -- | --
Ruby 2.7 | ruby2.7 | 3.0.1 | Amazon Linux 2
Ruby 2.5 | ruby2.5 | 3.0.1 | Amazon Linux

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Currently, `localstack/lambda` only contains the `ruby2.5` tag. Will the 2.7 runtime be supported in the (near) future?
runtime=LAMBDA_RUNTIME_DOTNETCORE2,
            expected_lines=['Running .NET Core 2.0 Lambda'])
    def test_dotnetcore31_lambda_running_in_docker(self):
        self.__run_test(
            func_name=TEST_LAMBDA_NAME_DOTNETCORE31,
            zip_file=self.zip_file_content31,
            handler='dotnetcore31::dotnetcore31.Function::FunctionHandler',
            runtime=LAMBDA_RUNTIME_DOTNETCORE31,
            expected_lines=['Running .NET Core 3.1 Lambda'])
class TestRubyRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):
        cls.lambda_client = aws_stack.connect_to_service('lambda')
    def test_ruby_lambda_running_in_docker(self):
        if not use_docker():
            return
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_RUBY,
            handler_file=TEST_LAMBDA_RUBY,
            handler='lambda_integration.handler',
            runtime=LAMBDA_RUNTIME_RUBY25
        )
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_RUBY, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '{}')
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_RUBY)
class TestJavaRuntimes(LambdaTestBase):