Update README.md

README.md

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-# aws-terminologies
+# aws-terminologies
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+1. **AWS RDS** : This is a relational database service offered by aws which operates on databases that use SQL ( for eg: MySQL, PostgreSQL, MariaDB, Aurora). This services focuses on automatically backing up, dupicating, and auto scaling of the data.
+2. **Aurora** : This is a fully functional database that is compatible with MySQL and PostgreSQL, and can be run on RDS. This is a fully managed DB that automates read replica and write replicas creation, it supports auto scaling and offers an automatic failover mechanism.\
+3. **AWS Codebuild** : This is a Continuous Integration platform that compiles the code, runs tests and produces production ready software packages. (like Jenkins)
+4. **AWS CodePipeline** : This is a CD service