Fix template.

Author: jmdobry

functions/helloworld/index.js

@@ -150,12 +150,13 @@ exports.helloError3 = function helloError3 (event, callback) {
 /* eslint-enable */
 
 // [START functions_helloworld_template]
+const path = require('path');
 const pug = require('pug');
 
 // Renders the index.pug
 exports.helloTemplate = (req, res) => {
  // Render the index.pug file
- const html = pug.renderFile('./index.pug');
+ const html = pug.renderFile(path.join(__dirname, 'index.pug'));
 
  res.send(html).end();
 };