added information into the README.md

README.md

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-# aws_etl_pipeline
+# Architecture 
+
+![Pipeline Architecture](images/architecture.png)
+
+# Tech Stack
+- Terraform 
+- Github actions (CI/CD)
+- AWS Glue Data Catalog
+- AWS Glue Crawler
+- AWS Glue Trigger
+- AWS Glue Classifier
+- AWS Glue ETL Job
+- AWS Lambda
+- AWS Eventbridge
+- Amazon S3
+- Amazon Athena
+- SQL
+- Python
+
+# Overwiew
+
+In this project, I have create an ETL Job on AWS using Terraform. 
+The project extract data from an API (Zillow) which are data from real estate, then, process it using AWS ETL Glue Job with Spark.
+Data is extracted from the API using lambda function which is scheduled to run every day. At the end, the data is stored in an s3 bucket in a JSON format. 
+
+The AWS Crawler then crawl the data and create a table in glue data catalog, then use AWS ETL job with Spark to process that real estate data and build a report to showcast, for each state, country the price per sqft. 
+
+For more information you can check this meduim article : 
+- [How I build an ETL pipeline with AWS Glue, Lambda and Terraform](https://medium.com/@lorenagongang/how-i-build-an-etl-pipeline-with-aws-glue-lambda-and-terraform-bbdf0788cc75)
+
+
+