[Bug] Github Actions: `build-storybook` fails with `no such directory`

[chandlervdw]

Build step fails when deploying via GH Actions

With a workflow like this:

name: Deploy Storybook to Github Pages
on:
  push:
    branches:
      - main
      
jobs:
  Deploy-Storybook:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Install 🔧
        run: yarn install
        
      - name: Build & Deploy Storybook 🚀
        run: yarn run deploy-storybook -- --ci
        env:
          GH_TOKEN: ${{ secrets.GH_TOKEN }}

I get the following error during the build-storybook step, where foo is the repo:

Error: Exec code(1) on executing: npm run build-storybook -- -o out6551
info @storybook/react v6.5.9
info 
info => Cleaning outputDir: /home/runner/work/foo/foo/out6551
info => Loading presets
/home/runner/work/foo/foo/node_modules/@storybook/core-server/dist/cjs/utils/server-statics.js:109
    throw new Error((0, _tsDedent.default)((0, _chalk.default)`
          ^

Error: Failed to load static files, no such directory: /home/runner/work/foo/foo/public
Make sure this directory exists, or omit the -s (--static-dir) option.

I've even tried this with

      - name: Build & Deploy Storybook 🚀
        run: yarn run deploy-storybook -- --ci
        env:
          GH_TOKEN: ${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}

Steps to reproduce the behavior

1. Create a new GH Actions workflow using the template above with the latest version of this npm package installed
2. Push to your main branch or tweak the workflow

Expected behavior

It should successfully deploy to gh-pages

Environment

• OS: ubuntu-latest GH Actions CI