(fix) Multer options (#261)
(fix) Multer options (#261)

There is no `fileSize` option for multer. (https://github.com/expressjs/multer#multeropts)
`fileSize` option is member of `limits`. (https://github.com/expressjs/multer#limits)
GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,srijangulati/sierracartel,srijangulati/sierracartel,thesandlord/nodejs-docs-samples,srijangulati/sierracartel,thesandlord/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples,JustinBeckwith/nodejs-docs-samples