UI: Missing translation when failed startup

[zigad]

Describe the bug

I noticed there is a missing translation when configuration is wrong and the program fails so I have added the missing translation of the text "Error during startup. Check your configuration and restart.".

We would probably need to update each error to also be translated but since there are many error we could do it later.

I have tested this locally and it works as expected.

1st line is now included in en.toml, second line of error should probably be also translatable in future.

I will create a pull request for you to review it and link it here.

Steps to reproduce

1. enter wrong configuration
   2.see the error

Configuration details

N/A

Log details

N/A

What type of operating system are you running?

Docker container

Version

N/A