Added Google Messager Bridge (#2794)

* intial commit

* changed

* Reorderd

* merge old changes

* added changes to matrix_servers

* Remove duplicate discord

* Update main.yml

* added google message to configuring-playbook.md

* Changed docs to add new changes

* Changed bug?

* Removed problem j2 values

* Rename a service files

* change how password hash string

* Changed port number

* Change how the local part works

* Revert "Merge pull request #8 from shreyasajj/wsproxy"

This reverts commit bb1b8fc67c, reversing
changes made to cce6ba5f9d.

---------

Co-authored-by: Shreyas Ajjarapu <github.tzarina@aleeas.com>

roles/custom/matrix-bridge-mautrix-gmessages/tasks/inject_into_nginx_proxy.yml

@@ -0,0 +1,35 @@
+---
+
+- name: Fail if matrix-nginx-proxy role already executed
+  ansible.builtin.fail:
+    msg: >-
+      Trying to append mautrix-gmessages-metrics's reverse-proxying configuration to matrix-nginx-proxy,
+      but it's pointless since the matrix-nginx-proxy role had already executed.
+      To fix this, please change the order of roles in your playbook,
+      so that the matrix-nginx-proxy role would run after the matrix-bridge-mautrix-gmessages role.
+  when: matrix_nginx_proxy_role_executed | default(False) | bool
+
+- when: matrix_mautrix_gmessages_metrics_proxying_enabled | bool
+  block:
+    - name: Generate mautrix-gmessages metrics proxying configuration for matrix-nginx-proxy (matrix.DOMAIN/metrics/mautrix-gmessages)
+      ansible.builtin.set_fact:
+        matrix_mautrix_gmessages_nginx_metrics_configuration_block: |
+          location /metrics/mautrix-gmessages {
+            {% if matrix_nginx_proxy_enabled | default(False) %}
+              {# Use the embedded DNS resolver in Docker containers to discover the service #}
+              resolver 127.0.0.11 valid=5s;
+              set $backend "matrix-mautrix-gmessages:8001";
+              proxy_pass http://$backend/metrics;
+            {% else %}
+              return 404 "matrix-nginx-proxy is disabled and no host port was bound to the container, so metrics are unavailable";
+            {% endif %}
+          }
+
+    - name: Register mautrix-gmessages metrics proxying configuration with matrix-nginx-proxy (matrix.DOMAIN/metrics/mautrix-gmessages)
+      ansible.builtin.set_fact:
+        matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks: |
+          {{
+            matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks | default([])
+            +
+            [matrix_mautrix_gmessages_nginx_metrics_configuration_block]
+          }}