The time zone of an WebApp will be UTC by default, but you may change it with an AppSetting.
I made a module for Episerver CMS that uses Microsoft Azure Cognitive Services Computer Vision API to generate automatic metadata for uploaded images.
With the introduction of the GDPR storing personal information is not something that should be taken lightly. Using Azure Cognitive Services it is possible to identify what's in the images that editors, or users, upload to your site. You may then choose to take action, based on the identified content and your policy.