fix: revert host network changes

ansible/roles/stack-proxy/tasks/main.yml_host_network

----
-- name: Ensure env directory exists
-  file:
-    path: /home/deployer/env
-    state: directory
-    owner: root
-    group: root
-
-- name: Ensure stack directory exists
-  file:
-    path: /home/deployer/stack
-    state: directory
-    owner: root
-    group: root
-
-- name: Ensure config directory exists
-  file:
-    path: /home/deployer/config
-    state: directory
-    owner: root
-    group: root
-
-- name: Save configurations into an env file
-  template: src=proxy.env dest=/home/deployer/env/proxy.env mode=0644
-
-- name: Save stack file
-  template: src=stack-proxy.yml dest=/home/deployer/stack/proxy.yml mode=0644
-
-- name: Save nginx.conf
-  template: src=nginx.conf dest=/home/deployer/config/nginx.conf mode=0644
-
-- name: Save proxy-default.conf
-  template: src=proxy-default.conf dest=/home/deployer/config/proxy-default.conf mode=0644
-
-- name: Remove old style proxy stack
-  shell: "docker stack rm {{image_name}}-{{env}}"
-  ignore_errors: yes
-
-- name: Remove stack
-  shell: "docker stack rm proxy"
-  ignore_errors: yes
-
-- name: Ensure network exists
-  shell: "docker network create --driver overlay {{item.name}} --subnet {{item.subnet}}"
-  with_items:
-    - "{{networks}}"
-  ignore_errors: true
-
-  # Ignoring ssl certs while proto=https mode
-- name: Remove docker secrets {{ item.name }}
-  shell: "docker secret rm {{ item.name }}"
-  with_items: "{{ proxy_secrets }}"
-  ignore_errors: true
-  no_log: true
-
-- name: Create docker secrets {{ item.name }}
-  shell: "echo '{{item.value}}' | docker secret create {{item.name}} -"
-  with_items: "{{ proxy_secrets }}"
-  ignore_errors: true
-  no_log: true
-
-- name: Remove old nginx.conf docker config
-  shell: "docker config rm nginx.conf"
-  ignore_errors: yes
-
-- name: Remove old proxy-default.conf docker config
-  shell: "docker config rm proxy-default.conf"
-  ignore_errors: yes
-
-- name: Save nginx.conf as docker config
-  shell: "docker config create nginx.conf /home/deployer/config/nginx.conf"
-
-- name: Save proxy-default.conf as docker config
-  shell: "docker config create proxy-default.conf /home/deployer/config/proxy-default.conf"
-
-- name: Login to docker
-  shell: "docker login {{ vault_docker_registry_url }} -u {{ vault_docker_registry_user }} -p {{ vault_docker_registry_password }}"
-  no_log: True
-  ignore_errors: yes
-
-- debug: msg="Image details= {{hub_org}}/{{image_name}}:{{image_tag}}"
-
-- debug: msg="server name= {{proxy_server_name}}"
-
-- name: Deploy stack
-  shell: "docker stack deploy -c proxy.yml proxy --with-registry-auth"
-  args:
-    chdir: /home/deployer/stack