fix(logger): Redirect logs to stderr instead of stdout

cmd/root.go

@@ -79,9 +79,11 @@ func initConfig() {
 	viper.AutomaticEnv()                                   // read in environment variables that match
 
 	// If a config file is found, read it in.
-	if err := viper.ReadInConfig(); err == nil {
-		logger.Infof("Using config file: %s", viper.ConfigFileUsed())
+	if err := viper.ReadInConfig(); err != nil {
+		logger.Errorf("Unable read from config: %s", err)
+		os.Exit(1)
 	}
+	logger.Infof("Using config file: %s", viper.ConfigFileUsed())
 }
 
 func initConfigFile() {
@@ -99,7 +101,7 @@ func initConfigFile() {
 			viper.SetConfigFile(configFile)
 			return
 		}
-		fmt.Printf("Config file not found at %s\n", configFile) //nolint: forbidigo
+		logger.Errorf("Config file not found at \"%s\"", configFile)
 		os.Exit(1)
 	}
 

internal/logger/logger.go

@@ -30,7 +30,7 @@ var (
 	logger        atomic.Value
 	defaultLevel  = "info"
 	defaultLogger = Logger{
-		Writer: os.Stdout,
+		Writer: os.Stderr,
 		Level:  LogLevelInfo,
 	}