apache reverse websocket
<VirtualHost *:80>
ServerName www.domain.com
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/socket.io [NC]
RewriteCond %{QUERY_STRING} transport=websocket [NC]
RewriteRule /(.*) ws://localhost:5000/$1 [P,L]
ProxyRequests Off
ProxyMaxForwards 100
ProxyPreserveHost On
ProxyPass / http://localhost:5000/
ProxyPassReverse / http://localhost:5000/
</VirtualHost>