* docs: update self-host guide link in README (#4704)
found via:
- https://github.com/makeplane/docs/issues/48
- https://github.com/makeplane/plane/pull/3109
* feat(configure_instance): add check for mandatory variables before starting
* fix(configure_instance): use correct variable and improve the exception
* fix(configure_instance): remove trailling spaces
* fix(configure_instance): check the mandatory value from exported env only
* fix(configure_instance): remove useless import
* fix(configure_command): improve the way error is raising
---------
Co-authored-by: jon ⚝ <jon@allmende.io>
bdd43f3f24