check repo before cloning

tasks/docker/docker.yml

@@ -1,10 +1,15 @@
 ---
+- name: Asses state of local repo
+  stat:
+    path: "{{ mastodon_composer_folder }}"
+  register: repo_folder
+
 - name: Clone Mastodon repo
   git:
     repo: https://github.com/mastodon/mastodon.git
     dest: "{{ mastodon_composer_folder }}"
     depth: 1
-  ignore_errors: true
+  when: not repo_folder.stat.exists
 
 - name: Copy Dockerfile from Mastodon repo
   copy: