gatus: check immich's ping endpoint for foto.scoutingmbg.nl

Without sol-auth in front, /_app is no longer the open path to check;
/api/server/ping answers without a login.

gatus/config.yaml

@@ -123,7 +123,7 @@ endpoints:
     conditions: *http-ok
   - name: foto.scoutingmbg.nl
     group: Scouting MBG
-    url: https://foto.scoutingmbg.nl/_app
+    url: https://foto.scoutingmbg.nl/api/server/ping
     interval: 60s
     conditions: *http-ok
 

nix-infra-machine/nodes/node001.nix

@@ -90,7 +90,7 @@ let
         conditions = [ "[CONNECTED] == true" "[CERTIFICATE_EXPIRATION] > 168h" ];
       }
       (gatusHttp "Scouting MBG" "scoutingmbg.nl" "https://scoutingmbg.nl" // gatusAlert)
-      (gatusHttp "Scouting MBG" "foto.scoutingmbg.nl" "https://foto.scoutingmbg.nl/_app" // gatusAlert)
+      (gatusHttp "Scouting MBG" "foto.scoutingmbg.nl" "https://foto.scoutingmbg.nl/api/server/ping" // gatusAlert)
       ({
         name = "s2 (homelab)";
         group = "watchers";