Add installation instructions

README.org

@@ -14,6 +14,26 @@ They also correspond to four stages of the day, with future intent being to tran
 | Leucosis  | White      | Mid-day     | Opal          |
 | Iosis     | Red/Purple | Dusk        | Sunset        |
 
+* Installation
+The four theme files in this repository can be copied to your emacs user directory, where emacs will recognise them on startup.
+
+Alternatively, the following snippet can be used to install the themes via Straight.
+#+begin_src elisp
+  ;; Load package through straight
+  (straight-use-package
+   '(ouroboros-emacs-themes :type git
+  			  :host nil
+  			  :repo "https://git.cyan.sh/BirDt/ouroboros-emacs-themes.git"
+  			  :files ("*.el")))
+
+  ;; Add build dir to custom theme load path
+  (add-to-list 'custom-theme-load-path
+  	     (expand-file-name (concat "straight/" straight-build-dir "/ouroboros-emacs-themes/") user-emacs-directory))
+
+  ;; Load melanosis
+  (load-theme 'melanosis t)
+#+end_src
+
 * Supported Packages
 Ouroboros aims to support the following additional Emacs packages natively with every theme:
 - Treemacs