feat: add announcement setting

Author: xhofe

bootstrap/setting.go

@@ -58,6 +58,14 @@ func InitSettings() {
 			Access:      model.PUBLIC,
 			Group:       model.FRONT,
 		},
+		{
+			Key:         "announcement",
+			Value:       "This is a test announcement.",
+			Description: "announcement message",
+			Type:        "text",
+			Access:      model.PUBLIC,
+			Group:       model.FRONT,
+		},
 		{
 			Key:         "text types",
 			Value:       strings.Join(conf.TextTypes, ","),