Added some docs

docs/about.md

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+# This is about document
+
+## Second level subtitle
+
+### Third level subtitle
+
+* Bullet 1
+* Bullet 2 
+
+code snippet
+```bash
+#!/bin/bash
+
+echo "Hello world!"
+```
+
+[My doc](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/Documents/O-ESD-02.pdf) 

docs/licence.md

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+# Licence file
+
+
+Here be licencing model upon which to dispose with docs.