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<VirtualHost *:7777>
        RequestHeader set X-Forwarded-Proto https
        RequestHeader set Access-Control-Allow-Origin: "https://<Nome externo do servidor>"
        RequestHeader set X-Forwarded-Host  <Nome externo do servidor>:7777

        ServerName  <Nome externo do servidor> 

       SetEnv proxy-sendchuncked
 SSLProxyEngine On
        SSLEngine On

        ProxyRequests Off
        <ProxyProxyPreserveHost *>On
        Order deny,allow
Include /etc/letsencrypt/options-ssl-apache.conf
        SSLCertificateFile Allow from all
 /etc/letsencrypt/live/nomedocertificado/cert.pem 
       </Proxy>
    ProxyPreserveHost On
 SSLCertificateKeyFile /etc/letsencrypt/live/nomedocertificado/privkey.pem

        # allow for upgrading to websockets
        RewriteEngine On
        RewriteCond %{REQUEST_URI} ^/socket.io
HTTP:Upgrade} =websocket [NC]
        RewriteRule /(.*)           ws://<IP do servidor Fluig>:7777/$1 [P,L]
        RewriteCond %{QUERY_STRINGHTTP:Upgrade} transport!=websocket [NC]
        RewriteRule /(.*) ws           http://<IP do servidor Fluig>:7777/$1 [P,L]


        ProxyPass "/" "http://<IP do servidor Fluig>:7777"
    /socket.io     ProxyPassReverse "/" "http://<IP do servidor Fluig>:7777/socket.io keepalive=On/"

        ProxyPass "/chatHub" "ws://<IP do servidor Fluig>:7777/chatHub"
        ProxyPassReverse "/socket.io httpchatHub" "ws://<IP do servidor Fluig>:7777/socket.io retry=0chatHub"

</VirtualHost>