Use variables instead of hardcoding service port numbers in labels for matrix-synapse

roles/custom/matrix-synapse/templates/synapse/labels.j2

@@ -5,8 +5,8 @@ traefik.enable=true
 traefik.docker.network={{ matrix_synapse_container_labels_traefik_docker_network }}
 {% endif %}
 
-traefik.http.services.matrix-synapse-client-api.loadbalancer.server.port=8008
-traefik.http.services.matrix-synapse-federation-api.loadbalancer.server.port=8048
+traefik.http.services.matrix-synapse-client-api.loadbalancer.server.port={{ matrix_synapse_container_client_api_port }}
+traefik.http.services.matrix-synapse-federation-api.loadbalancer.server.port={{ matrix_synapse_container_federation_api_plain_port }}
 
 
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