offline help

I did install it using the compose file and it worked when am connected to internet.

now i did set (VERSION) Environment Variable to [1.21.51.02] and it worked while am only online , i did try to set (ONLINE_MODE) to [false] but that did not seem to help , i get this while i am offline
```
DEBU[0000] Using /data to match uid and gid
DEBU[0000] Resolved UID=1000 from match path
DEBU[0000] Resolved GID=1000 from match path
Using given version 1.21.51.02
```
and it doesn't load any further. however, while i am online it works just fine.

note : "am not an English native speaker i learnt it from video games , so sorry if am not understandable"

note 2 : "if you need any more info just tell me i'll check it anytime soon"

Start with the compose file and reproduce the startup using VERSION=1.21.51.02 and ONLINE_MODE=false while disconnected from the internet. Trace the startup after the shown version message and compare it with an online run. Done means the configured Bedrock server starts successfully offline, or the missing offline requirement is clearly documented.

Written by the indexing model from the issue text.