apt_repository: add caddy repo as molecule test

roles/apt_repository/molecule/default/verify.yml

@@ -7,6 +7,10 @@
       ansible.builtin.slurp:
         src: /etc/apt/sources.list.d/docker.list
       register: docker_repo
+    - name: Get content of caddy source file
+      ansible.builtin.slurp:
+        src: /etc/apt/sources.list.d/caddy-stable.list
+      register: caddy_repo
 
     - name: Ensure docker repo file content is as expected
       ansible.builtin.assert:
@@ -19,3 +23,15 @@
           deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.asc]
           https://download.docker.com/linux/{{ ansible_distribution | lower }}
           {{ ansible_distribution_release }} stable but it contained {{ docker_repo.content | b64decode }} instead
+
+    - name: Ensure caddy repo file content is as expected
+      ansible.builtin.assert:
+        that: >
+          caddy_repo.content | b64decode == "deb [signed-by=/etc/apt/keyrings/caddy-stable.asc]
+          https://dl.cloudsmith.io/public/caddy/stable/deb/debian
+          any-version main\n"
+        msg: >
+          /etc/apt/sources.list.d/caddy-stable.list should contain
+          deb [signed-by=/etc/apt/keyrings/caddy-stable.asc]
+          https://dl.cloudsmith.io/public/caddy/stable/deb/debian
+          any-version main but it contained {{ docker_repo.content | b64decode }} instead