Add more stable reverse proxy updating

roles/whoami/handlers/main.yml

@@ -0,0 +1,32 @@
+## Register reverse proxy
+
+# figure out if upstream id exists
+- name: check whoami upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl localhost:2019/id/{{ stack.name }}_upstream/
+  changed_when: False
+  register: result
+  become: yes
+  listen: "handle upstream"
+
+# upstream has to be created
+- name: add whoami upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl -X POST -H "Content-Type: application/json" -d @/stacks/{{ stack.name }}/upstream.json localhost:2019/config/apps/http/servers/srv0/routes/0/ 
+  become: yes
+  when: (result.stdout | from_json)['error'] is defined
+  listen: "handle upstream"
+
+# upstream already exists, patch it
+- name: patch whoami upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl -X PATCH -H "Content-Type: application/json" -d @/stacks/{{ stack.name }}/upstream.json localhost:2019/id/{{ stack.name }}_upstream/
+  become: yes
+  when: (result.stdout | from_json)['error'] is not defined
+  listen: "handle upstream"