Alias /error_docs /var/www/error_pages
ProxyPass /error_docs !
ErrorDocument 400 /error_docs/BadRequest.html
ErrorDocument 401 /error_docs/Unauthorized.html
ErrorDocument 403 /error_docs/Forbidden.html
ErrorDocument 404 /error_docs/NotFound.html
ErrorDocument 500 /error_docs/ServerError.html
ErrorDocument 503 /error_docs/server_offline.html