chore: backup infrastructure configurations [skip ci]

nomad_backup/check-firewall.hcl

@@ -0,0 +1,22 @@
+job "check-firewall" {
+  datacenters = ["dc1"]
+  type        = "batch"
+
+  group "check" {
+    count = 1
+    constraint {
+      attribute = "${attr.unique.hostname}"
+      value     = "odroid7"
+    }
+
+    task "check" {
+      driver = "docker"
+      config {
+        image        = "busybox"
+        network_mode = "host"
+        command      = "sh"
+        args         = ["-c", "nc -zv 127.0.0.1 20202 && echo 'Listening'"]
+      }
+    }
+  }
+}