* feat(ui): Add customizable OIDC login screen branding
As per https://github.com/TwiN/gatus/discussions/1579, this PR
allows for some customizations in the OIDC login screen:
- If a logo is set it will be displayed alongside the Gatus one
- New ui config `ui.login-subtitle`: customises the message in
the screen
- If set, use `ui.header` will be used to customise the title
I haven't commited the web static assets. I believe that's
triggered with a comment? let me know if I should be doing it.
Also please clarify if I've forgotten about something here,
this is my first pr.
* chore(ui): Regenerate static assets
---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: TwiN <twin@linux.com>
12be9facda