update README.md

README.md

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 # ketotrack
-Simple GKI calculator written as an exercise in learning Go.
+Simple ketosis tracker written in Go.
 
-Currently, this only calculates your GKI and stores the results into a JSON file. At some point I'll get around to
-implementing note-taking and time-series display.
+## Features
+- Record your blood glucose and ketone levels
+- Record notes about things that might affect your ketosis
 
-## Usage
-After measuring your blood glucose and blood ketone levels, run `ketotrack`. GKI will be displayed along with
-the level of ketosis you are in according to [Keto-Mojo](https://keto-mojo.com/glucose-ketone-index-gki/):
-```
-Enter glucose reading (mg/dL): 77
-Enter ketone reading (mmol/L): 1.1
-
-Your GKI is: 3.89
-You're in a moderate level of ketosis.
-```
-
-Reading data will be saved to `$HOME/.ketotrack/readings.json`.
+Reading data will be saved to `$HOME/.ketotrack/records.json` and graphing will be implemented at a later date.
 
 ## Building and Installing
+At some point I'll include a Makefile, until then manually build and copy to any directory in your path.
 ```shell
 go build
 mv ketotrack $HOME/.local/bin
 ```
-
-## Refactoring Notes
-- [X] Create `Record` and `Note` struct types
-- [X] Add `GKI` field to `Reading` struct type
-- [X] Encapsulate application data with an `AppContext` struct that holds a `Records` slice
-  - [X] `LoadRecords`, `SaveRecords`, `AddReading`, `AddNote` receiver methods
-- [X] Add interactive menu for adding either a `Note` or a `Record`
-- [ ] Standardize method names for getting user input to `handleNewNote` and `handleNewReading`