Added logger singleton

utils/logger/logger.go

@@ -0,0 +1,27 @@
+package logger
+
+import (
+	"sync"
+
+	"go.uber.org/zap"
+)
+
+var (
+	instance Logger    // Global instance of Logger interface
+	once     sync.Once // Ensures logger is initialized only once
+)
+
+// Init initializes the global logger. This function should be called once, ideally during the app startup.
+func Init(zapLogger *zap.Logger) {
+	once.Do(func() {
+		instance = NewZapLogger(zapLogger) // Assign the zapLogger as the global logger
+	})
+}
+
+// Get returns the global logger instance.
+func Get() Logger {
+	if instance == nil {
+		panic("Logger is not initialized. Call logger.Init() before using the logger.")
+	}
+	return instance
+}