fix: dont print to stdout using color/non json formatted output when …

…running with JSON output logger (#1188)

cmd/flipt/main.go

@@ -302,10 +302,18 @@ func run(ctx context.Context, logger *zap.Logger) error {
 
 			switch cv.Compare(lv) {
 			case 0:
-				color.Green("You are currently running the latest version of Flipt [%s]!", cv)
+				if isConsole {
+					color.Green("You are currently running the latest version of Flipt [%s]!", cv)
+				} else {
+					logger.Info("running latest version", zap.Stringer("version", cv))
+				}
 			case -1:
 				updateAvailable = true
-				color.Yellow("A newer version of Flipt exists at %s, \nplease consider updating to the latest version.", release.GetHTMLURL())
+				if isConsole {
+					color.Yellow("A newer version of Flipt exists at %s, \nplease consider updating to the latest version.", release.GetHTMLURL())
+				} else {
+					logger.Info("newer version available", zap.Stringer("version", lv), zap.String("url", release.GetHTMLURL()))
+				}
 			}
 		}
 	}