feat(cli): add information for cli installation (#3915)

Author: bene2k1

developer-tools/scaleway-cli/quickstart.mdx

@@ -57,6 +57,15 @@ Install the latest stable release on Windows using [Chocolatey](https://communit
 choco install scaleway-cli
 ```
 
+## Manual installation on other OS
+
+Scaleway provides [static compiled binaries](https://github.com/scaleway/scaleway-cli/releases/latest) GNU/Linux and macOS platforms.
+Use the following command to download a binary compatible with your platform directly in your `PATH`:
+
+```
+curl -s https://raw.githubusercontent.com/scaleway/scaleway-cli/master/scripts/get.sh | sh
+```
+
 <Message type="tip">
 Refer to the [Scaleway CLI repository](https://github.com/scaleway/scaleway-cli) for alternative installation methods.
 </Message>