roles/Zigbee2MQTT: Deploy using Podman

Zigbee2MQTT is very similar to ZwaveJS2Mqtt: it is a daemon process that
communicates with the Zigbee radio and integrates with Home Assistant
using MQTT.  Naturally, I decided to deploy it in the same way as
ZwaveJS2Mqtt, using a systemd unit to run it in a container with Podman.

roles/zigbee2mqtt/tasks/main.yml

@@ -0,0 +1,68 @@
+- name: ensure podman is installed
+  package:
+    name: '{{ zigbee2mqtt_podman_packages }}'
+    state: present
+  tags:
+  - install
+
+- name: ensure zigbee2mqtt user exists
+  user:
+    name: zigbee2mqtt
+    system: true
+    home: /var/lib/zigbee2mqtt
+    groups:
+    - dialout
+    createhome: false
+  register: zigbee2mqtt_user
+  tags:
+  - user
+
+- name: ensure zigbee2mqtt data directory exists
+  file:
+    path: /var/lib/zigbee2mqtt
+    owner: zigbee2mqtt
+    group: zigbee2mqtt
+    mode: '0755'
+    state: directory
+  tags:
+  - datadir
+
+- name: ensure zigbee2mqtt container image is available
+  podman_image:
+    name: docker.io/koenkk/zigbee2mqtt
+    tag: latest
+    state: present
+  notify:
+  - restart zigbee2mqtt
+  tags:
+  - container-image
+  - container
+
+- name: ensure zigbee2mqtt systemd unit is installed
+  template:
+    src: zigbee2mqtt.service.j2
+    dest: /etc/systemd/system/zigbee2mqtt.service
+    mode: '0644'
+  notify:
+  - reload systemd
+  - restart zigbee2mqtt
+  tags:
+  - service
+  - systemd
+- name: ensure zigbee2mqtt starts at boot
+  service:
+    name: zigbee2mqtt
+    enabled: true
+  tags:
+  - service
+
+- name: ensure zigbee2mqtt is configured
+  template:
+    src: configuration.yaml.j2
+    dest: /var/lib/zigbee2mqtt/configuration.yaml
+    owner: zigbee2mqtt
+    group: zigbee2mqtt
+    mode: '0600'
+    force: false
+  notify:
+  - restart zigbee2mqtt