feat: add API_HOST env
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@@ -744,6 +744,27 @@ Port for the API service to listen on.
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API_PORT=3000
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```
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### API_HOST
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**Type**: `string`
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**Required**: No
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**Default**: `0.0.0.0` (production) / `localhost` (development)
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Host address for the API service to bind to. Set to `::` to enable IPv6 support (useful for platforms like Railway that use IPv6 for internal networking).
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**Example**:
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```bash
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# Default IPv4 only
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API_HOST=0.0.0.0
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# IPv6 (dual-stack, accepts both IPv4 and IPv6)
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API_HOST=::
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```
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<Callout>
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Use `API_HOST=::` when deploying on platforms like Railway where private networking requires IPv6. The `::` address enables dual-stack mode, accepting both IPv4 and IPv6 connections on most systems.
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</Callout>
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## Logging
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### LOG_LEVEL
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