Update README.md

README.md

@@ -13,7 +13,9 @@ This is a template project to mix-and-match TypeScript and Lua for your Picotron
 
 - Create a new project (i.e. `my-project`) from this template
 - Clone `my-project` in your Picotron's `drive` folder
-- `cd my-project` then `pnpm install`
+- `cd my-project` then
+    - `pnpm install`
+    - `pnpm build`
 - Inside Picotron:
     - Open the terminal, `cd my-project` then `load game`
     - Edit `main.lua` to change the `cd` line to `cd("/my-project/build")`