🔧 config: add log output file configuration and cleanup example files

cmd/server/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"os"
 
 	"DanceLessonsCoach/pkg/config"
 	"DanceLessonsCoach/pkg/server"
@@ -15,6 +16,9 @@ func main() {
 		log.Fatal().Err(err).Msg("Failed to load configuration")
 	}
 
+	// Setup log output based on configuration
+	setupLogOutput(cfg)
+
 	// Create readiness context to control readiness state
 	readyCtx, readyCancel := context.WithCancel(context.Background())
 	defer readyCancel()
@@ -25,3 +29,23 @@ func main() {
 		log.Fatal().Err(err).Msg("Server failed")
 	}
 }
+
+// setupLogOutput configures the log output based on configuration
+func setupLogOutput(cfg *config.Config) {
+	output := cfg.GetLogOutput()
+	if output == "" {
+		// Use stderr by default
+		return
+	}
+	
+	// Open the log file
+	file, err := os.OpenFile(output, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		log.Error().Err(err).Str("output", output).Msg("Failed to open log file, using stderr")
+		return
+	}
+	
+	// Set the log output
+	log.Logger = log.Output(file)
+	log.Info().Str("output", output).Msg("Logging to file")
+}