readme: add info on installing using MacPorts (#241)

herbygillot · web-flow · commit 151a61b90081 · 2021-01-15T10:51:40.000+01:00
diff --git a/Readme.md b/Readme.md
@@ -15,6 +15,13 @@
 
 ```sh
 $ brew install clib
+```
+
+  Or [MacPorts](https://www.macports.org):
+
+```sh
+$ sudo port selfupdate
+$ sudo port install clib
 ```
 
   With git:
