update README file

README.md

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 # Dronery
 
-Python based REST API to handle a drones delivery service.
+Python based REST API to handle a drones delivery service using the micro framework Bottle.
+
+## General goals
+- JSON based input/output
+- Standards compliant endpoints with a versionated API interface '/api/v#' (althought just v1 is being developed at the moment)
+- Dependencies at the minimum
+- Portability (use a local database)
+- Bare bones API features to keep the server implementation general enough but, it imposes more processing on the client side
+- Image files are not support in binary format, just Base64 encodings with an associated MIME type for the client to know how to handle it
+
+## General features
+- Drones management through '/api/v#/drones' endpoint
+- Medications management through '/api/v#/medications' endpoint
+- Images management through '/api/v#/images' endpoint (Base64 encoding only)
+- Loads management through '/api/v#/loads' endpoint
+- CORS enabled for browser based clients
+- Cache control headers support (just a general no-store policy at the moment)
 
 ## Run (hosted)
 - Install Python 3.9.7+ (it may work with any Python 3 version but it is only tested against v3.9.7)