roles/containers: use systemd instead of docker module

arch doesn't package python-docker-compose so just docker compose up via
systemd instead of ansible

roles/containers/defaults/main.yml

@@ -3,4 +3,4 @@
 # these are defaults
 # change these in group/host vars
 
-docker_compose_dir: "/home/{{ ansible_user }}/services"
+docker_compose_dir: "/opts/services"

roles/containers/tasks/main.yml

@@ -15,9 +15,16 @@
 
 - name: Generate docker-compose.yml
   template:
-    src: "docker-compose.yml"
+    src: "docker-compose.yml.j2"
     dest: "{{ docker_compose_dir }}/docker-compose.yml"
 
-- name: Docker compose up
-  community.docker.docker_compose:
-    project_src: "{{ docker_compose_dir }}"
+- name: Create systemd unit file
+  template:
+    src: "docker-compose.service.j2"
+    dest: "/etc/systemd/system/docker-compose.service"
+
+- name: Compose up
+  systemd:
+    name: docker-compose
+    state: started
+    enabled: true

roles/containers/templates/docker-compose.service.j2

@@ -0,0 +1,15 @@
+[Unit]
+Description=Services manager with docker-compose
+Requires=docker.service
+After=docker.service
+
+[Service]
+WorkingDirectory={{ docker_compose_dir }}
+ExecStartPre=-/usr/bin/docker compose pull
+ExecStart=/usr/bin/docker compose up --remove-orphans
+ExecStop=/usr/bin/docker compose down
+ExecReload=/usr/bin/docker compose pull
+ExecReload=/usr/bin/docker compose up --remove-orphans
+
+[Install]
+WantedBy=multi-user.target

roles/containers/templates/docker-compose.yml.j2

@@ -19,7 +19,6 @@ services:
       - gitea
     volumes:
       - {{ dataroot }}/gitea:/data
-      - {{  }}
       - /etc/timezone:/etc/timezone:ro
       - /etc/localtime:/etc/localtime:ro
     ports: