feat: make eliza server URL configurable via env var when starting eliza client

[bguiz]

Is your feature request related to a problem? Please describe.

• When running the Eliza server that is served on anything other than http://localhost:3000
• Eliza client is hardcoded to only connect to this URL

Describe the solution you'd like

• Make this configurable rather than hard coded

Describe alternatives you've considered

• What works is manually editing const BASE_URL = ... in eliza/client/src/lib/api.ts

Additional context

Nil.

[jgarrettvml]

Totally agree, quite annoying to always have to go in and change the base URL for network

[bguiz]

@jgarrettvml I've implemented the fix for this, and it's been merged already.
So you'll be able to use it in the next release.
#3589

Totally agree, quite annoying to always have to go in and change the base URL for network