How do I move the discourse installed server to another server without loss?

[Lilly]

this should have most of the info you need:

Move your Discourse Instance to a Different Server

This is a guide for moving your Discourse instance from one server to another, including all settings and data. This guide applies to self-hosted Discourse instances using Docker. Required user level: System Administrator This procedure involves domain and DNS changes. Ensure you have access to both the source and destination servers. This guide walks you through the process of migrating your Discourse instance from one server to another, ensuring …