Replace all log.Println and fmt.Printf with Zap structured logging

cmd/main.go

@@ -2,14 +2,15 @@ package main
 
 import (
 	"context"
-	"fmt"
-	"log"
 	"music-server/internal/db"
+	"music-server/internal/logging"
 	"music-server/internal/server"
 	"net/http"
 	"os/signal"
 	"syscall"
 	"time"
+
+	"go.uber.org/zap"
 )
 
 //
@@ -41,15 +42,15 @@ func main() {
 	// Run graceful shutdown in a separate goroutine
 	go gracefulShutdown(server, done)
 
-	log.Printf("Open http://localhost%s in the browser", server.Addr)
+	logging.GetLogger().Info("Server starting", zap.String("address", server.Addr))
 	err := server.ListenAndServe()
 	if err != nil && err != http.ErrServerClosed {
-		panic(fmt.Sprintf("http server error: %s", err))
+		logging.GetLogger().Fatal("HTTP server error", zap.String("error", err.Error()))
 	}
 
 	// Wait for the graceful shutdown to complete
 	<-done
-	log.Println("Graceful shutdown complete.")
+	logging.GetLogger().Info("Graceful shutdown complete")
 }
 
 func gracefulShutdown(apiServer *http.Server, done chan bool) {
@@ -60,7 +61,7 @@ func gracefulShutdown(apiServer *http.Server, done chan bool) {
 	// Listen for the interrupt signal.
 	<-ctx.Done()
 
-	log.Println("shutting down gracefully, press Ctrl+C again to force")
+	logging.GetLogger().Info("Shutting down gracefully, press Ctrl+C again to force")
 	db.CloseDb()
 
 	// The context is used to inform the server it has 5 seconds to finish
@@ -68,10 +69,10 @@ func gracefulShutdown(apiServer *http.Server, done chan bool) {
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	if err := apiServer.Shutdown(ctx); err != nil {
-		log.Printf("Server forced to shutdown with error: %v", err)
+		logging.GetLogger().Error("Server forced to shutdown with error", zap.String("error", err.Error()))
 	}
 
-	log.Println("Server exiting")
+	logging.GetLogger().Info("Server exiting")
 
 	// Notify the main goroutine that the shutdown is complete
 	done <- true