Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/hosted_customer.go

@@ -0,0 +1,21 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package app
+
+import (
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+func (a *App) NotifySelfHostedSignupProgress(progress string, userId string) {
+	// this is an event only the relevant admin should receive.
+	// If there is no progress, there is nothing to report.
+	// If there is no userId, we do not want to mistakenly broadcast to all users.
+	if progress == "" || userId == "" {
+		return
+	}
+	message := model.NewWebSocketEvent(model.WebsocketEventHostedCustomerSignupProgressUpdated, "", "", userId, nil, "")
+	message.Add("progress", progress)
+
+	a.Srv().Platform().Publish(message)
+}