fix(Logger): make buffer size user customizable

logger/logger.go

@@ -6,10 +6,12 @@ import (
 	"net/http"
 	"reflect"
 	"sync"
+
+	Assert "github.com/lbatuska/goutils/assert"
 )
 
 // Use this in the init() function to initialize the size of the buffered channel
-const logbuffersize int32 = 200
+const Logbuffersize int32 = 200
 
 var DEBUG bool = true
 
@@ -27,6 +29,7 @@ func Create(instance Logger) {
 }
 
 func LoggerInstance() Logger {
+	Assert.NotNil(loggerInstance)
 	return loggerInstance
 }