replace npm commands with yarn

web/README.md

@@ -2,13 +2,13 @@
 
 ## Getting Started
 
-1. Run `npm install`
-2. Run `npm run dev`
+1. Run `yarn`
+2. Run `yarn run devdev`
 3. Your site will be available on http://localhost:3000
 
 ## Formatting
 
-Before committing, run `npm run format` to format your code.
+Before committing, run `yarn run format` to format your code.
 
 Recommended: Use a [Prettier editor integration](https://prettier.io/docs/en/editors.html) to automatically format on save