docs: added install instructions (#6)

README.md

@@ -15,7 +15,11 @@ I do this for fun and on my free time, so if you have any issues or suggestions,
 
 The first thing you need to know is: **don't use `go install github.com/belitre/canu`, that would add `canu` as an executable to your `$GOPATH/bin` with name `canu`, and we don't want that!**
 
-* Download the binary for your OS/ARCH from the release page and unpack it in a folder available in your `$PATH`
+* Download the binary for your OS/ARCH from the release page and unpack it in a folder available in your `$PATH` (I'll use for the example `$GOPATH/bin`):
+  ```
+  curl -sL https://github.com/belitre/canu/releases/download/1.0.0/canu-1.0.0-darwin-arm64.tar.gz | tar -zxf - -C $GOPATH/bin
+ 
+  ```
 * Run `_canu install` (more details about flags incoming!)
 * Restart your shell, or run the alias returned in the `_canu install` output.
-* Use your alias and enjoy!
+* Run `canu` and enjoy!