Adapt to more scoped config

plays/postdeploy/lib/https.yml

@@ -1,17 +1,17 @@
 ---
 - name: Setup lets encrypt certificates
-  shell: "dokku letsencrypt {{ app }}"
+  shell: "dokku letsencrypt {{ dokku.app }}"
   args:
-    creates: "/home/dokku/{{ app }}/letsencrypt/certs"
+    creates: "/home/dokku/{{ dokku.app }}/letsencrypt/certs"
 
 - name: Setup lets encrypt certificates renew cron job
   shell: dokku letsencrypt:cron-job --add
   args:
-    creates: "/home/dokku/{{ app }}/letsencrypt/cron-job"
+    creates: "/home/dokku/{{ dokku.app }}/letsencrypt/cron-job"
 
 - name: Set HTTP 443 port
   dokku_ports:
-    app: "{{ app }}"
+    app: "{{ dokku.app }}"
     mappings:
-      - "https:443:{{ port }}"
+      - "https:443:{{ vars.port }}"
     state: present