add --count and --count-prompt flags

add support for env vars.

add count prompt logic to the root command

update the README.

README.md

@@ -16,6 +16,33 @@ Play National Lottery games from your terminal.
 go install github.com/onyx-and-iris/lottery-cli/cmd/lottery@latest
 ```
 
+## Configuration
+
+*flags*
+
+-   --count/-c: Number of draws to generate.
+-   --count-prompt/-C: Prompt for the number of draws to generate.
+> Note. If both --count and --count-prompt are passed the count prompt will win.
+
+*environment variables*
+
+```bash
+#!/usr/bin/env bash
+
+export LOTTERY_COUNT=3
+export LOTTERY_COUNT_PROMPT=false
+```
+
+## Use
+
+There are no subcommands, just run the CLI directly passing any desired flags:
+
+```bash
+lottery --count=3
+```
+
+You will then be entered into the selection prompt.
+
 ## Special Thanks
 
 -   [spf13](https://github.com/spf13) for the [cobra](https://github.com/spf13/cobra) package.