client/nginx: increase timeouts

client/nginx.conf.docker

@@ -50,6 +50,9 @@ http {
             gzip_proxied expired no-cache no-store private auth;
             gzip_types text/plain application/json;
 
+            proxy_connect_timeout 180s;
+            proxy_send_timeout 300s;
+            proxy_read_timeout 600s;
             if ($request_uri ~* "/api/(.*)") {
                 proxy_pass http://backend/$1;
             }