docs(ui): document UI_CLOUD_ENABLED runtime variable

docs/developer-guide/environment-variables.mdx

@@ -36,6 +36,9 @@ The former build-time variables map to the new runtime variables as follows:
 | `NEXT_PUBLIC_GOOGLE_TAG_MANAGER_ID` | `UI_GOOGLE_TAG_MANAGER_ID` |
 | `NEXT_PUBLIC_SENTRY_DSN`, `SENTRY_DSN` | `UI_SENTRY_DSN` |
 | `NEXT_PUBLIC_SENTRY_ENVIRONMENT`, `SENTRY_ENVIRONMENT` | `UI_SENTRY_ENVIRONMENT` |
+| `NEXT_PUBLIC_IS_CLOUD_ENV` | `UI_CLOUD_ENABLED` |
+
+`UI_CLOUD_ENABLED` is a plain runtime boolean flag that enables Prowler Cloud behavior when set to the exact string `"true"` and defaults to off; unlike the other renamed variables it has no legacy fallback, so `NEXT_PUBLIC_IS_CLOUD_ENV` is no longer read.
 
 The build-time-only Sentry variables used for source-map upload — `SENTRY_ORG`, `SENTRY_PROJECT`, `SENTRY_AUTH_TOKEN`, and `SENTRY_RELEASE` — keep their names, as they are not part of Prowler Local Server's runtime configuration.
 

ui/Dockerfile

@@ -79,6 +79,7 @@ ENV HOSTNAME="0.0.0.0"
 # Helm/K8s):
 #   - required: UI_API_BASE_URL, AUTH_URL, AUTH_SECRET (missing ⇒ fail fast at boot)
 #   - optional: UI_API_DOCS_URL
+#   - optional: UI_CLOUD_ENABLED ("true" only in Prowler Cloud deployments)
 #   - gated integrations (load only when *_ENABLED="true"; the value is then
 #     required or boot fails). Legacy names (NEXT_PUBLIC_*, POSTHOG_KEY/HOST)
 #     still activate without the flag: