Timeout app Digital Ocean ShinyProxy Ngix droplet


So I have a Digital Ocean ShinyProxy droplet spinned up using a Ngix server. I have set heartbeat-timeout: 999999999 and configured the ngix config file adding:

proxy_read_timeout 99999999;
proxy_connect_timeout 99999999;
proxy_send_timeout 99999999;

to the http {} block

Yet the app still greys out. How come?