Fix multer options (#256)
Fix multer options (#256)

* Fix multer options

There is no "inMemory" options.

* Update app.js

GoogleCloudPlatform/nodejs-docs-samples,srijangulati/sierracartel,srijangulati/sierracartel,srijangulati/sierracartel,thesandlord/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples,thesandlord/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples