Ensure settings for Service and Mailer are read on the install page

modules/setting/setting.go

@@ -1180,3 +1180,9 @@ func NewServices() {
 	newProject()
 	newMimeTypeMap()
 }
+
+// NewServicesForInstall initializes the services for install
+func NewServicesForInstall() {
+	newService()
+	newMailService()
+}

routers/init.go

@@ -100,6 +100,7 @@ func PreInstallInit(ctx context.Context) bool {
 			log.Info("SQLite3 Supported")
 		}
 		setting.InitDBConfig()
+		setting.NewServicesForInstall()
 		svg.Init()
 	}