severless_lambda_deployment.yml

Resources:
  LambdaFunction:
    Type: AWS::Lambda::Function
    Properties:
      FunctionName:
        Fn::Sub: "test-lambda"
      Description: Demo LambdaFunction for learning using cloudformation
      Runtime: "go1.x"
      Code:
        S3Bucket: your_s3_bucket_name
        S3Key: !Ref your_lambda_handler_name
      Handler: main
      MemorySize: 128
      Timeout: 10
      Role: !GetAtt LambdaExecutionRole.Arn
      Environment:
        Variables:
          ACCESS_KEY_ID: 
            Fn::Sub: your_aws_secret_key_id
          SECRET_ACCESS_KEY: 
            Fn::Sub: your_aws_secret_access_key 
          REGION_AWS: 
            Fn::Sub: your_aws_region
          GIN_MODE: release