Stress test app and server

[jkaczman]

The mobile app's weakest point seems to be when there's a backload of videos. We should create a tool to quickly load lots of videos and notifications into the server. This would allow us to diagnose these issues much easier.

Additionally, we could simulate with multiple fake users uploading videos like this. This would help with performance testing the production server to ensure it can handle lots of users.

Tasks:

• Stress test for app [milestone v1.0.0]
• Stress test for prodS server [milestone v1.0.1]