Updated README

README.md

@@ -3,11 +3,25 @@ An Extract, Transform, Load app to gather book information from public API for a
 
 Environmental Variables:
 `GOOGLE_API_KEY` - API Key required for using the Google Books API.
-`LIBRARYTHING_TOKEN` - A Token used to query librarything.com. Can be aquired through https://www.librarything.com/developer/tokens
+`DB_NAME`        - The name of the SQL database being used
+`DB_USER`        - The authorized user for the database
+`DB_PASSWORD`    - The Password to access the database
+`LOG_FILE`       - The file location for logs to be saved to
+`LOGGING_LEVEL`  - The logging level desired for operation. `logging.INFO` is standard,  
+                   but `logging.DEBUG` can be used for more insight and `logging.ERROR` if only issues are needed.
 
 ## extract.py
 The extract.py file contains functions to pull data related to books from different APIs.
 
 ## transform.py
+Takes the raw JSON stored by extract.py and transforms the entries into a single entry whose keys  
+match the column names of the database schema.
 
-## load.py
+## load.py
+Takes the JSON file created by transform.py and loads the data into a PostgreSQL database for  
+retreival later.
+
+## orchestrator.py
+Handles the orchestration of each program being ran one after the other. Ensures each  
+executes with no fatal errors before moving on to the next. Also cleans up files created  
+by the programs before ending.