Adding installation instructions.

README.md

@@ -1,3 +1,38 @@
 # OwlTestRunner
 
-A test runner for it's usage for testing C.
+A test runner for it's usage for testing C.
+
+## Requirements
+
+### Gentoo
+
+```shell
+sudo emerge -a sys-libs/db
+```
+
+### Debian-like
+
+```shell
+sudo apt update
+sudo apt install libdb-dev
+```
+
+## Installing
+
+Clone this repo and cd into the cloned directory and run:
+
+```shell
+cpan .
+```
+
+If it is the first time using cpan it will prompt you to some questions about
+how do you want to setup cpan.
+
+If you choose local::lib, after answering them restart your shell or
+source ~/.bashrc, if using a non-bash shell you may have to add manually the
+appropiate environment variables to your shell's rc, you can get those by issuing the
+following command:
+
+```shell
+PERL5LIB="$HOME/perl5/lib/perl5" perl -Mlocal::lib
+```