added scaffolding and ufw setup

roles/firewall/meta/main.yml

@@ -0,0 +1,6 @@
+---
+galaxy_info:
+  author: cjr
+  description: Configure and enable ufw firewall
+  license: BSD-3-Clause
+  min_ansible_version: "2.1"

roles/firewall/tasks/main.yml

@@ -0,0 +1,26 @@
+---
+- name: Install packages needed for ufw
+  community.general.pacman:
+    name:
+      - ufw
+      - ufw-extras
+    state: present
+
+- name: Configure the firewall incoming connection policy
+  community.general.ufw:
+    direction: incoming
+    policy: deny
+
+- name: Configure the firewall outgoing connection policy
+  community.general.ufw:
+    direction: outgoing
+    policy: allow
+
+- name: Allow incoming ports
+  community.general.ufw:
+    rule: allow
+    port: "22"
+    proto: tcp
+- name: Enable UFW
+  community.general.ufw:
+    state: enabled