RabbitMQ is of use for supporting Plane on Cloudron.
It has quite high resting RAM requirements. So, LavinMQ might be even better as lighter resting requirements.
https://plane.so/
Plane requires RabbitMQ (AMQP) for all async job processing. The Worker and Beat Worker services consume from RabbitMQ queues. There is no way to substitute Redis for this purpose: Plane switched from Redis/Celery to RabbitMQ explicitly.
Cloudron has addons for PostgreSQL, MySQL, MongoDB, and Redis, but nothing for AMQP/RabbitMQ.