[Feature]: Make ollama hostname configurable

[digitalstudium]

Description

Ollama can be deployed on remote server, so it would be nice to have an option to set Ollama hostname via environment variable

Suggested Solution

In this file: https://github.com/di-sukharev/opencommit/blob/master/src/engine/ollama.ts#L15
read ollama hostname from environment variable instead of hardcoded localhost

Alternatives

No response

Additional Context

No response

[di-sukharev]

hi @digitalstudium gonna try to get to it, but feel free to outrun me :)