support logging request logs and database query logs to separate files, and support rotating log files

pkg/errs/logging.go

@@ -0,0 +1,10 @@
+package errs
+
+import (
+	"net/http"
+)
+
+// Error codes related to logging
+var (
+	ErrLoggingError = NewSystemError(SystemSubcategoryLogging, 0, http.StatusInternalServerError, "logging error")
+)