Switch JSON middleware for UrlEncoded (#2436)
Switch JSON middleware for UrlEncoded (#2436)

The form in `views/form.html` submits normally via the browser (`application/x-www-form-urlencoded`) so it needs the `express.urlencoded()` middleware instead of `express.json()`

Co-authored-by: Benjamin E. Coe <69440dae14aaa9fe2429b324bfce03449d09e1db@google.com>
GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples