Initial work on matrix-homeserver-proxy role and eliminating matrix-nginx-proxy

This is still very far from usable.

Various bridges and bots are still talking to
`matrix-nginx-proxy` instead of the new `matrix-homeserver-proxy` role.
These services need to be reworked. While reworking them,
various cleanups are being done as well as adding Traefik-labels to
those that need them.

roles/custom/matrix-bot-chatgpt/tasks/install.yml

@@ -56,6 +56,11 @@
           path: "{{ matrix_bot_chatgpt_container_src_path }}"
           pull: true
 
+- name: Ensure chatgpt container network is created
+  community.general.docker_network:
+    name: "{{ matrix_bot_chatgpt_container_network }}"
+    driver: bridge
+
 - name: Ensure matrix-bot-chatgpt.service installed
   ansible.builtin.template:
     src: "{{ role_path }}/templates/systemd/matrix-bot-chatgpt.service.j2"

roles/custom/matrix-bot-chatgpt/tasks/validate_config.yml

@@ -8,6 +8,8 @@
   with_items:
     - {'name': 'matrix_bot_chatgpt_openai_api_key', when: true}
     - {'name': 'matrix_bot_chatgpt_matrix_bot_username', when: true}
+    - {'name': 'matrix_bot_chatgpt_container_network', when: true}
+    - {'name': 'matrix_bot_chatgpt_matrix_homeserver_url', when: true}
 
 - name: Fail if OpenAI configuration not up-to-date.
   ansible.builtin.fail: