[FEATURE] Localai Authorization key

[Dbone29]

Describe the feature you'd like
You can set one or more API_KEY= in the .env in localai. If this is set, the localai server requires an Authorisation: Bearer Token and thus no longer allows requests that do not have this header. It would be nice to be able to specify this token in flowise.

Additional context
This function exists since localai v1.24.0 and must be entered manually in the .env.

[avin-kavish]

@HenryHengZJ I can try this. Would it work if I implement it as a input to the nodes or should I have it as an .env setting?

[kkacsh321]

I worked this out locally, and put up a PR here: #1495 that should satisfy this with any luck.