Use tmpfs instead of persistent mount

roles/matrix-cactus-comments/defaults/main.yml

@@ -18,6 +18,7 @@ matrix_cactus_comments_as_token: ''
 matrix_cactus_comments_hs_token: ''
 matrix_cactus_comments_homeserver_url: ''
 matrix_cactus_comments_user_id: "bot.cactusbot"
+matrix_cactus_comments_tmp_directory_size_mb: 1
 
 matrix_cactus_comments_container_port: 5000
 

roles/matrix-cactus-comments/templates/systemd/matrix-cactus-comments.service.j2

@@ -22,7 +22,7 @@ ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-cactus-comment
 			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
 			--read-only \
 			--env-file {{ matrix_cactus_comments_app_service_env_file }} \
-            --mount type=bind,src={{ matrix_cactus_comments_container_tmp_path }},dst=/tmp \
+             --tmpfs=/tmp:rw,noexec,nosuid,size={{ matrix_cactus_comments_tmp_directory_size_mb }}m \
 			--network={{ matrix_docker_network }} \
 			{{ matrix_cactus_comments_docker_image }}