Stabilize Datum container networking

apps/api/src/datum/poller.ts

@@ -64,7 +64,7 @@ function formatErr(err: unknown): string {
       const datumHost = new URL(config.datum.url).hostname;
       const hint =
         hostname === datumHost
-          ? "; check DATUM_NETWORK or set DATUM_URL to a hostname/IP reachable from the gashboard API container"
+          ? "; make sure gashboard is attached to Umbrel's Docker network or set DATUM_URL to a hostname/IP reachable from the API container"
           : "";
       return `${err.message}: DNS could not resolve ${hostname} (${code})${hint}`;
     }