Add haskell package manager help

Guides/code.md

@@ -4,4 +4,18 @@ Guide to install languages, IDE and configure them.
 
 ## Haskell
 
+### Compiler
+
 `sudo apt install ghc`
+
+### Package manager
+
+`sudo apt install cabage-install`
+
+`cabage --help`
+
+`cabage list 'random'`
+
+### Install _random_ package
+
+`cabage install random`