Changed how all docker images have their version set to use the compose repo

ansible/plays/machine_setup/grist.yml

@@ -27,6 +27,9 @@
         grist_dir: /opt/grist
         grist_hostname: grist.atlashorizon.net
         grist_oidc_issuer_host: auth.atlashorizon.net
+        # Branch of AtlasHorizon/compose to deploy from; override with
+        # `-e compose_branch=<branch>` to test unmerged changes.
+        compose_branch: main
       block:
         - name: Create persist directory
           ansible.builtin.file:
@@ -34,11 +37,14 @@
             state: directory
             mode: "0755"
 
-        - name: Deploy docker-compose.yml
-          ansible.builtin.copy:
-            src: templates/grist-docker-compose.yml
+        # force: true so changes in the compose repo are picked up on reruns;
+        # it only reports changed when the content differs.
+        - name: Download docker-compose.yml
+          ansible.builtin.get_url:
+            url: "https://git.atlashorizon.net/AtlasHorizon/compose/raw/branch/{{ compose_branch }}/grist/docker-compose.yml"
             dest: "{{ grist_dir }}/docker-compose.yml"
             mode: "0644"
+            force: true
 
         # Pulled from Infisical, not generated/persisted to disk. Run this
         # playbook as `infisical run -- ansible-playbook -i inventory ...`