Use simpler file structure

roles/common/templates/nftables.j2

@@ -0,0 +1,19 @@
+# {{ ansible_managed }} {{ ansible_date_time.time }} {{ ansible_date_time.date }}
+#
+# vim:set ts=2 sw=2 et:
+
+flush ruleset
+
+table inet filter {
+	chain input {
+		type filter hook input priority 0; policy drop;
+
+		# accept any localhost traffic
+		iif lo accept
+
+		# accept traffic originated from us
+		ct state { established, related } accept
+
+		tcp dport 22 accept
+	}
+}