Update README.md

README.md

@@ -20,7 +20,7 @@ The required python libraries:
    - [requests](https://2.python-requests.org/en/master/)
 
 ## Setup and running the API   
-The database connection needs to be set up first. This is set in config.json
+The database connection needs to be set up first. This is set in config.json, an example config file called `config.json.example` is provided.
 
 
 To run the API from the command line, the enviroment variable `FLASK_APP` should be set to `src/main.py`. Once this is