Networks: create internal docker network for proxy server

Prepare to use caddy in docker

vars/homepage.yml

@@ -1,6 +1,6 @@
 app_name: "homepage"
 app_user: "{{ app_name }}"
-base_dir: "/home/{{ app_name }}"
+base_dir: "/home/{{ app_user }}"
 docker_registry_prefix: "cr.yandex/crplfk0168i4o8kd7ade"
 
 homepage_web_image: "{{ homepage_web_image | default(omit) }}"