Fix repo cloning in docker build process

tasks/docker/build.yml

@@ -2,9 +2,10 @@
 - name: Clone repositories
   when: item.value.build is defined
   git:
-    dest: /tmp/{{ item.key }}
     repo: "{{ item.value.build.repository }}"
+    dest: /tmp/{{ item.key }}
     version: "{{ item.value.build.version }}"
+    accept_hostkey: true
   loop: "{{ omni_compose_apps | dict2items }}"
   loop_control:
     label: "{{ item.key }}"