Path is not defined when trying to publish to Github Pages

Cannot publish to Github pages. Documentation has an error. https://github.com/kriasoft/react-static-boilerplate/blob/master/docs/recipes/deploy-to-github-pages.md

Code:
```node
tasks.set('publish', () => {
const remote = {
url: 'https://github.com//.git', // TODO: Update deployment URL
branch: 'gh-pages',
};
global.DEBUG = process.argv.includes('--debug') || false;
const spawn = require('child_process').spawn;
const opts = { cwd: path.resolve(__dirname, './public'), stdio: ['ignore', 'inherit', 'inherit'] };
const git = (...args) => new Promise((resolve, reject) => {
spawn('git', args, opts).on('close', code => {
if (code === 0) {
resolve();
} else {
reject(new Error(`git ${args.join(' ')} => ${code} (error)`));
}
});
});

return Promise.resolve()
.then(() => run('clean'))
.then(() => git('init', '--quiet'))
.then(() => git('config', '--get', 'remote.origin.url')
.then(() => git('remote', 'set-url', 'origin', remote.url))
.catch(() => git('remote', 'add', 'origin', remote.url))
)
.then(() => git('ls-remote', '--exit-code', remote.url, 'master')
.then(() => Promise.resolve()
.then(() => git('fetch', 'origin'))
.then(() => git('reset', `origin/${remote.branch}`, '--hard'))
.then(() => git('clean', '--force'))
)
.catch(() => Promise.resolve())
)
.then(() => run('build'))
.then(() => git('add', '.', '--all'))
.then(() => git('commit', '--message', new Date().toUTCString())
.catch(() => Promise.resolve()))
.then(() => git('push', 'origin', `HEAD:${remote.branch}`, '--force', '--set-upstream'));
});
```

Error:
```bash
$ node run publish
Starting 'publish'...
ReferenceError: path is not defined
at tasks.set (/Users/eneff/Desktop/react static/run.js:105:23)
at Promise.resolve.then (/Users/eneff/Desktop/react static/run.js:31:54)
at process._tickCallback (internal/process/next_tick.js:103:7)
at Module.runMain (module.js:607:11)
at run (bootstrap_node.js:420:7)
at startup (bootstrap_node.js:139:9)
at bootstrap_node.js:535:3
```

The deployment instructions are in docs/recipes/deploy-to-github-pages.md; start by comparing the publish snippet with the reported ReferenceError from node run publish and inspect how path is used. Correct the documented example so path is available, then rerun node run publish and confirm it proceeds past that error.

Written by the indexing model from the issue text.