Update README.md

Link to original mGB repo

README.md

@@ -2,16 +2,25 @@
 
 https://mgb-waveform-edit.web.app/
 
-This tool allows one to replace the waveform that is selected in the WAV channel. It sends a custom
-SysEx message to mGB, so you will need:
+This tool allows one to edit the waveform for [mGB](https://github.com/trash80/mGB). It works via a SysEx message.
 
-1. A custom mGB built from [this branch](https://github.com/tstirrat/mGB/pull/6)
+You will need:
+
+1. A custom mGB - built from [this branch](https://github.com/tstirrat/mGB/pull/6)
 1. An ArduinoBoy or some way to send MIDI to the mGB cart
 
 I have not tested it in RetroPlug, in theory it should work.
 
 ### Running the development server
 
 ```
+bun install
 bun run dev
 ```
+
+### Building the app
+
+```
+bun install
+bun run build
+```