challenger: more minor migrations

hosts/challenger/backup.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+{
+  services.borgbackup.jobs =
+    let
+      borgJob = name: {
+        environment.BORG_RSH = "ssh -i /root/.ssh/fealsyn1";
+        environment.BORG_REMOTE_PATH = "/usr/local/bin/borg";
+        repo = "ssh://backup@feal-syn1.home.feal.no/volume2/backup/borg/voyager/${name}";
+        compression = "auto,zstd";
+      };
+    in {
+      postgresDaily = borgJob "postgres::daily" // {
+        paths = "/var/backup/postgres";
+        startAt = "*-*-* 05:15:00"; # 2 hours after postgresqlBackup
+        extraInitArgs = "--storage-quota 10G";
+        encryption = {
+          mode = "repokey-blake2";
+          passCommand = "cat ${config.sops.secrets."borg/postgres".path}";
+        };
+      };
+
+      postgresWeekly = borgJob "postgres::weekly" // {
+        paths = "/var/backup/postgres";
+        startAt = "Mon *-*-* 05:15:00"; # 2 hours after postgresqlBackup
+        extraInitArgs = "--storage-quota 10G";
+        encryption = {
+          mode = "repokey-blake2";
+          passCommand = "cat ${config.sops.secrets."borg/postgres".path}";
+        };
+      };
+
+      # TODO: timemachine, nextcloud, komga, calibre
+
+    };
+
+  sops.secrets."borg/postgres" = { };
+  sops.secrets."borg/transmission" = { };
+}