simplify context timeout for readiness (#9772)

additionally also add CORS support to restrict
for specific origin, adds a new config and
updated the documentation as well

cmd/peer-rest-client.go

@@ -677,19 +677,7 @@ func (client *peerRESTClient) BackgroundHealStatus() (madmin.BgHealState, error)
 }
 
 // GetLocalDiskIDs - get a peer's local disks' IDs.
-func (client *peerRESTClient) GetLocalDiskIDs() []string {
-	doneCh := make(chan struct{})
-	defer close(doneCh)
-
-	ctx, cancel := context.WithCancel(GlobalContext)
-	go func() {
-		select {
-		case <-doneCh:
-			return
-		case <-time.After(globalReadyDeadline):
-			cancel()
-		}
-	}()
+func (client *peerRESTClient) GetLocalDiskIDs(ctx context.Context) []string {
 	respBody, err := client.callWithContext(ctx, peerRESTMethodGetLocalDiskIDs, nil, nil, -1)
 	if err != nil {
 		return nil