Add backups for bigding

modules/backups/bigding/default.nix

@@ -0,0 +1,45 @@
+{
+  pkgs,
+  config,
+  ...
+}: {
+  age.secrets = {
+    bigding_backup_s3_creds.file = ../../../secrets/bigding_backup_s3_creds.age;
+    bigding_backup_repo_password.file = ../../../secrets/bigding_backup_repo_password.age;
+  };
+
+  services.restic.backups = {
+    "system" = {
+      initialize = true;
+      passwordFile = config.age.secrets.bigding_backup_repo_password.path;
+      timerConfig = {
+        OnCalendar = "02:00";
+      };
+      repository = "s3:s3.eu-central-003.backblazeb2.com/bigding-backup";
+      s3CredentialsFile = config.age.secrets.bigding_backup_s3_creds.path;
+
+      paths = [
+        "/etc/group"
+        "/etc/machine-id"
+        "/etc/NetworkManager/system-connections"
+        "/etc/passwd"
+        "/etc/subgid"
+        "/home"
+        "/root"
+        "/var/lib/prometheus2"
+        "/var/lib/jellyfin"
+        "/var/lib/fail2ban"
+        "/var/lib/matrix-synapse"
+        "/var/lib/golink"
+        "/var/lib/tailscale"
+        "/var/lib/caddy"
+        "/var/backup"
+      ];
+
+      backupPrepareCommand = ''
+        ${pkgs.postgresql_13}/bin/pg_dumpall --clean -U postgres | ${pkgs.zstd}/bin/zstd --rsyncable > /var/backup/pgdump.sql.zst
+      '';
+
+    };
+  };
+}