fix: package distribution (#10515) (#10519)

* show warning text

* fix formatting

* try to gather site-url correctly

* protect envs that are set in the config

* raise issue if they appear

* prefer app setting over file config

* preserve setting if injected via envs

(cherry picked from commit c83a9b01ce)

Co-authored-by: Matthias Mair <code@mjmair.com>

docs/docs/settings/error_codes.md

@@ -9,9 +9,12 @@ Errors - These are critical errors which should be addressed as soon as possible
 #### INVE-E1
 **No frontend included - Backend/web**
 
-Only stable / production releases of InvenTree include the frontend panel. This is both a measure of resource-saving and attack surface reduction. If you want to use the frontend panel, you can either:″
+Only stable / production releases of InvenTree include the frontend panel. This is both a measure of resource-saving and attack surface reduction.
+
+If you want to use the frontend panel, you can either:
+
 - use a docker image that is version-tagged or the stable version
-- use a package version that is from the stable or version stream
+- use a package version that is from the stable or version stream - if you are and it is not working, run `sudo inventree run cli update` to re-run the upgrade
 - install node and yarn on the server to build the frontend with the [invoke](../start/invoke.md) task `int.frontend-build`
 
 Raise an issue if none of these options work.