Update version endpoint

## What
We need to separate the look for version in database endpoint,
and look for version on gothub endpoint.

## Why
Show if there are any new versions of gridly for the user.

## Defentions of done
look for version, is it stored in database or cashed ?
If its not stored return not found, go to other endpoint check version, stored and cache.
If its stored get the version, check third party endpoint for version
If they are same version set boolean to false.
If they are different versions, header should show new version on client and version name.
Cash new version and set boolean to true.
If Ratelimiter is active for third party call, just send 200 back.
It should check by itself every 8 h