I need estimate hardware configuration for a server with the following requirements:

Backend using Nest.js Frontend using Next.js Microservice using Flask The backend will utilize FFmpeg processes to stream and record video without audio from Hikvision IP cameras with the following parameters:

Model: Hyvision ds-2cd1023g0e-i
Codec: H.265+
Maximum bitrate: 4096 Kbps
Resolution: 1920x1080p at 30fps

We will start with 5 cameras but plan to scale up to 20 cameras.
ip-camera, recording uninterruptedly for several days