Don't overwrite vars

ansible/post-deploy.yml

@@ -48,12 +48,12 @@
 
     - name: Retrieve application container IP address
       shell: "dokku ps:inspect gitea | jq  .[0].NetworkSettings.IPAddress"
-      register: dokku_container_ip
+      register: dokku_ps_inspect
 
     - name: Setup the SSH passthrough script
       vars:
         ssh_listen_port: "{{ ssh_listen_port }}"
-        dokku_container_ip: "{{ dokku_container_ip.stdout }}"
+        dokku_container_ip: "{{ dokku_ps_inspect.stdout }}"
       template:
         src: gitea.j2
         dest: /app/gitea/gitea