Add deployment-time build tooling for custom docker images

tasks/docker/build.yml

@@ -0,0 +1,23 @@
+---
+- name: Clone repositories
+  when: item.value.build is defined
+  git:
+    dest: /tmp/{{ item.key }}
+    repo: "{{ item.value.build.repository }}"
+    version: "{{ item.value.build.version }}"
+  loop: "{{ omni_compose_apps | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+
+- name: Build image
+  when: item.value.build is defined
+  docker_image:
+    source: build
+    name: "{{ item.key }}"
+    tag: "{{ item.value.build.version }}"
+    build:
+      path: /tmp/{{ item.key }}
+      rm: true
+  loop: "{{ omni_compose_apps | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"