Add Enterprise On-Prem Setup Documentation (#401)

* Update self-host/enterprise-on-prem.mdx

Co-Authored-By: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

* Update docs.json

Co-Authored-By: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

---------

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: mintlify[bot]

docs.json

@@ -252,6 +252,7 @@
             "pages": [
               "self-host/self-host-lightdash",
               "self-host/lightdash-cloud-vs-self-hosted",
+              "self-host/enterprise-on-prem",
               "self-host/self-host-lightdash-docker-compose",
               "self-host/self-host-lightdash-restack",
               "self-host/update-lightdash",

self-host/enterprise-on-prem.mdx

@@ -0,0 +1,52 @@
+---
+title: "Enterprise on-prem setup"
+description: "Guide for deploying Lightdash Enterprise Edition on your own infrastructure"
+---
+
+This guide covers the setup requirements and best practices for deploying Lightdash Enterprise Edition on-premises.
+
+## Prerequisites
+
+- Postgres database with the `pgvector` extension installed
+
+## Accessing the Lightdash image
+
+The Lightdash image is available on [DockerHub](https://hub.docker.com/repository/docker/lightdash/lightdash/tags). You can pull a specific version (recommended) or use `latest`.
+
+```bash
+docker pull lightdash/lightdash:0.2248.3
+```
+
+### Recommended version strategy
+
+We publish frequent releases, and we don't currently provide an LTS (long-term support) or "stable" tag for self-hosted deployments.
+
+**Our recommendation:**
+
+- **Use a pinned version in production** (e.g. `lightdash/lightdash:0.2248.3`) rather than `latest`
+- Pinning makes deployments repeatable and avoids unexpected changes
+
+**Treat upgrades as a controlled rollout:**
+
+1. Upgrade in **staging** first
+2. Run your normal validation (SSO, connections, dbt refreshes, scheduled jobs, embeds, critical dashboards)
+3. Roll out to **production** when you're comfortable
+
+## License key
+
+A license key is required for Enterprise Edition features. Set it via the `LIGHTDASH_LICENSE_KEY` environment variable. Your license key will be shared by the Lightdash team via 1Password.
+
+<Note>
+License validation requires outbound access to `https://api.keygen.sh`.
+</Note>
+
+For detailed configuration instructions, see [Enterprise License Keys](/self-host/customize-deployment/enterprise-license-keys).
+
+## Migration from OSS
+
+If you're migrating from the open-source version to Enterprise Edition:
+
+1. Migrate to a commercial version matching your current OSS version
+2. Once a single container is running the commercial version, the connected database will be upgraded to include the commercial schemas
+3. Any other OSS containers will fail on restart but can be run temporarily
+4. Roll out the commercial version to all containers as soon as the first container successfully migrates