Add the possibility to pass extra flags to the docker container

roles/matrix-mxisd/defaults/main.yml

@@ -8,6 +8,9 @@ matrix_mxisd_data_path: "{{ matrix_mxisd_base_path }}/data"
 # Controls whether the mxisd web server's port (`8090`) is exposed outside of the container.
 matrix_mxisd_container_expose_port: false
 
+# A list of extra arguments to pass to the container
+matrix_mxisd_container_extra_arguments: []
+
 # List of systemd services that matrix-mxisd.service depends on
 matrix_mxisd_systemd_required_services_list: ['docker.service']
 

roles/matrix-mxisd/templates/systemd/matrix-mxisd.service.j2

@@ -27,6 +27,9 @@ ExecStart=/usr/bin/docker run --rm --name matrix-mxisd \
 			{% endif %}
 			-v {{ matrix_mxisd_config_path }}:/etc/mxisd:ro \
 			-v {{ matrix_mxisd_data_path }}:/var/mxisd:rw \
+			{% for arg in matrix_mxisd_container_extra_arguments %}
+			{{ arg }} \
+			{% endfor %}
 			{{ matrix_mxisd_docker_image }}
 
 ExecStop=-/usr/bin/docker kill matrix-mxisd