Added MacPorts (#15)

Author: applejag

src/content/docs/setup/install.mdx

@@ -45,6 +45,16 @@ brew install kubecolor
 
 :::
 
+## MacPorts
+
+[![MacPorts version](https://repology.org/badge/version-for-repo/macports/kubecolor.svg)](https://repology.org/project/kubecolor/versions)
+
+For MacOS users using the [MacPorts](https://www.macports.org/) package manager.
+
+```bash
+sudo port install kubecolor
+```
+
 ## DEB
 
 [![debian version from custom repo](https://img.shields.io/github/v/release/kubecolor/kubecolor?label=deb%20package&color=4cc61f)](https://github.com/kubecolor/kubecolor/releases/latest)