Add content to README.md and fix licenses

[benedeki]

Background

Basic setup of the project is needed.

Feature

Add content to the README.md and check the license text in the files is correct.

Proposed Solution

README.md content:

1. Description of the project/app, it's purpose and target (content of the presentation form Hackathon can be used)
2. Logic of processing
3. Requirements

Licenses check:

1. Year of inception (2023)
2. whitespaces