Updated Reverse Proxy (markdown)

Reverse-Proxy.md

@@ -7,6 +7,7 @@ Unlikely other web apps, Uptime Kuma is based on WebSocket. You need two more he
 - [Caddy](#caddy)
 - [Nginx Proxy Manager](#nginx-proxy-manager)
 - [Synology Builtin Reverse Proxy](#synology-builtin-reverse-proxy)
+- [Cloudflare](#cloudflare)
 - [SSL/HTTPS](#ssl-https)
 
 
@@ -96,6 +97,16 @@ Please enable "WebSockets Supports"
 
 https://mlohr.com/websockets-for-synology-dsm/
 
+# Cloudflare
+
+You must enable "WebSockets" in Cloudflare Dashboard:
+
+Cloudflare Dashboard -> Network -> Enable WebSockets
+
+Read more:
+https://github.com/louislam/uptime-kuma/issues/138#issuecomment-890485229
+
+
 # SSL/HTTPS
 
 It is recommended to use SSL(HTTPS) with your web-server to avoid MiTM attacks when on a public network. If using caddy these certificates will be auto-generated by caddy and will keep them updated.