BigBlueButton & Nextcloud:

- Switch to custom BBB Docker repository
- Externalize Coturn and Collabora by default
- Add dedicated 03_dependencies.yml for dependency handling
- Improve env templating with lowercased feature flags
- Add conditional healthcheck for Greenlight
- Refactor TURN/STUN/relay handling with role variable _BBB_COTURN_ROLE
- Extend Collabora/Greenlight dependency wiring in override file
- Nextcloud Talk: refine vars and enable/disable logic with separate plugin/service flags, add network_mode support and conditional nginx proxy block

Ref: https://chatgpt.com/share/68d741ff-a544-800f-9e81-a565e0bab0eb

roles/web-app-bigbluebutton/templates/docker-compose.override.yml.j2

@@ -5,6 +5,7 @@ services:
       MS_ENABLE_IPV6: "false"
       MS_WEBRTC_LISTEN_IPS: >-
         [{"ip":"0.0.0.0","announcedIp":"${EXTERNAL_IPv4}"}]
+{% if BBB_COTURN_ENABLED | bool %}
   coturn:
     ports:
       - "{{ BBB_TURN_PORT }}:{{ BBB_TURN_PORT }}/udp"
@@ -27,3 +28,19 @@ services:
       {% if BBB_IP6_ENABLED %}--external-ip=${EXTERNAL_IPv6}{% endif %}
       --cert=${COTURN_TLS_CERT_PATH}
       --pkey=${COTURN_TLS_KEY_PATH}
+{% endif %}
+{% if BBB_GREENLIGHT_ENABLED | bool %}
+  greenlight:
+{% set container_port = 3000 %}
+{% include 'roles/docker-container/templates/healthcheck/nc.yml.j2' %}
+{% endif %}
+{% if BBB_COLLABORA_ENABLED | bool %}
+  bbb-web:
+    depends_on:
+      - redis
+      - etherpad
+      - bbb-pads
+  etherpad:
+    depends_on:
+      - redis
+{% endif %}

roles/web-app-bigbluebutton/templates/env.j2

@@ -1,11 +1,15 @@
 # Coturn
-ENABLE_COTURN={{ BBB_INTERNAL_COTURN_ENABLED }}
+ENABLE_COTURN={{ BBB_COTURN_ENABLED | lower }}
+
+# Collabora
+ENABLE_COLLABORA={{ BBB_COLLABORA_ENABLED | lower }}
+COLLABORA_URL={{ BBB_COLLABORA_URL }}
 
 ## Credentials
 COTURN_TLS_CERT_PATH={{ BBB_COTURN_TLS_CERT_PATH }}
 COTURN_TLS_KEY_PATH={{ BBB_COTURN_TLS_KEY_PATH }}
 
-ENABLE_GREENLIGHT={{ BBB_GREENLIGHT_ENABLED }}
+ENABLE_GREENLIGHT={{ BBB_GREENLIGHT_ENABLED | lower }}
 
 # Enable Webhooks
 # used by some integrations