Mention macports installation procedure on macOS (#1352)

* Mention macports installation procedure on macOS

Author: dgsb

docs/src/docs/usage/install/index.mdx

@@ -53,6 +53,13 @@ brew install golangci/tap/golangci-lint
 brew upgrade golangci/tap/golangci-lint
 ```
 
+It can also be installed through [macports](https://www.macports.org/)
+The macports installation mode is community driven, and not officially maintained by golangci team.
+
+```sh
+sudo port install golangci-lint
+```
+
 ### Docker
 
 ```sh