Add startup message (#18)

Author: Tomy2e

cmd/main.go

@@ -85,6 +85,10 @@ func main() {
 
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
 
+	setupLog.Info("Thank you for choosing Scaleway as your infrastructure provider for Cluster API! "+
+		"Stay up to date with the latest news, updates, and important announcements by joining "+
+		"the #cluster-api channel on our Slack: https://slack.scaleway.com/", "version", internalVersion.Version)
+
 	// if the enable-http2 flag is false (the default), http/2 should be disabled
 	// due to its vulnerabilities. More specifically, disabling http/2 will
 	// prevent from being vulnerable to the HTTP/2 Stream Cancellation and