Sidekiq no relation PostgreSQL
Server requirements
The officially-provided, x86 64 Linux, Docker images are the supported method for installing Discourse. Discourse uses a custom "launcher" script to configure the containers.
The Docker-based distribution includes the web server (which is based on nginx and Unicorn), database system (PostgreSQL), cache (Redis), and background processing services (Sidekiq).
Discourse requires an outgoing MTA and does not provide one itself.
Discourse also supports, but does not require, the ability to receive email. Discourse provides an optional Docker image for an incoming-only MTA, and supports receiving email via POP3 or IMAP.
no relation