RewriteEngine On
RewriteCond %{HTTP_HOST} ^sandbox\.onbuild\.com\.br$ [NC]
RewriteRule ^(.*)$ http://162.240.156.176:8088/$1 [P,L]

# Habilitar o módulo proxy e proxy_http, caso necessário
<IfModule mod_proxy.c>
    ProxyRequests Off
    ProxyPass / http://162.240.156.176:8088/
    ProxyPassReverse / http://162.240.156.176:8088/
</IfModule>