sudo a2enmod proxy_http
sudo a2enmod proxy proxy_wstunnel

 ProxyRequests Off
 ProxyPreserveHost On
 ProxyPass / http://127.0.0.1:9003
 ProxyPassReverse / http://127.0.0.1:9003

sudo systemctl reload apache2

location / {
        proxy_pass http://127.0.0.1:9003;
        proxy_set_header Host 127.0.0.1:$server_port;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header REMOTE-HOST $remote_addr;
}