Added solus install information

Linux-instructions.md

@@ -26,6 +26,11 @@ dnf copr enable evana/fira-code-fonts
 dnf install fira-code-fonts
 ```
 
+### Solus
+
+Fira Code package is available in the official repository: `font-firacode-ttf` and `font-firacode-otf`.  
+They can be installed by running: `sudo eopkg install font-firacode-ttf font-firacode-otf`
+
 ## Manual Installation
 
 With most desktop-oriented distributions, double-clicking each font file in the ttf folder and selecting “Install font” should be enough. If it isn’t, create and run download_and_install.sh script: