add installation section on README.md

README.md

@@ -8,3 +8,17 @@ MMind-qt is qt version of number guessing game, similar to [Mastermind board gam
 The game starts with entering a length, and you a number of chances equal to it,
 then, you must guess a number as long as that length. the game responds by X for incorrect digits and # for right ones.
 The goal is to guess whole number completely before losing all of your chances.
+
+## Installation
+
+You may download binaries for windows, linux and openbsd from [releases page](://releases).
+
+## Compiling
+
+for compiling on windows you need qt, for OpenBSD you need `qt6-qtbase`, on Linux you need to have `qmake`, `qt` librares installed.
+
+```
+$ qmake
+$ make
+$ ./mastermind-qt
+```