Optimized mail integration and solved bugs (hopefully I didn't create more)

roles/docker-nextcloud/templates/docker-compose.yml.j2

@@ -13,11 +13,27 @@ services:
     volumes:
       - data:/var/www/html
     environment:
+      # Database Configuration
       MYSQL_DATABASE: "{{database_name}}"
       MYSQL_USER: "{{database_username}}"
       MYSQL_PASSWORD: "{{database_password}}"
       MYSQL_HOST: {{database_host}}:3306
+      
+      # Memory
       PHP_MEMORY_LIMIT: 1G # Required for plugin duplicate finder
+      
+      # Email Configuration
+      SMTP_HOST: {{system_email_host}}
+      SMTP_SECURE: {{ 'ssl' if system_email_start_tls else 'tls' }}
+      SMTP_PORT: {{system_email_smtp_port}}
+      SMTP_NAME: {{system_email_username}}
+      SMTP_PASSWORD: {{system_email_password}}
+
+      # Email from configuration
+      # MAIL_FROM_ADDRESS: no-reply
+      # MAIL_DOMAIN: {{domain}}
+
+At least SMTP_HOST, MAIL_FROM_ADDRESS and MAIL_DOMAIN must be set for the configurations to be applied.
 {% include 'templates/docker/container/depends-on-database-redis.yml.j2' %}
 {% include 'templates/docker/container/networks.yml.j2' %}