update readme

README.md

@@ -2,6 +2,36 @@
 
 PHP 8 / Composer Library for NPS Protocol (see also [nex-php](https://github.com/YGGverse/nex-php))
 
+## About
+
+Like Titan for Gemini, NPS is the satellite for Nex protocol\\
+it uses dot in line to signal the package ending.
+
+### Example
+
+1. `nc nightfall.city 1915` - connect server using `nc`
+2. `classifieds` - enter the target path
+3. `YOUR MESSAGE GOES HERE` - enter the message text
+4. `.` - commit package with dot
+
+To send any file:
+
+* `nano file.txt`
+
+``` file.txt
+classifieds
+╦ ╦╔═╗╔═╗╔╦╗╦═╗╔═╗╔═╗╦╦
+╚╦╝║ ╦║ ╦ ║║╠╦╝╠═╣╚═╗║║
+ ╩ ╚═╝╚═╝═╩╝╩╚═╩ ╩╚═╝╩╩═╝
+.
+```
+
+* `cat file.txt | nc nightfall.city 1915`
+
+### Specification
+
+`nex://nightfall.city/nps/`
+
 ## Usage
 
 ```