Customizable Websockets Security

[moothz]

Introduces the ability to specify allowed remote IPs for WebSocket connections via the WEBSOCKET_ALLOWED_HOSTS environment variable.

The variable should contain a comma-separated string of addresses. If not set, the behavior defaults to allowing localhost connections only.

This change further enhances the security measures introduced in #1802.

Summary by Sourcery

Enable customizable security for WebSocket connections by allowing remote IP whitelisting via an environment variable with a fallback to localhost

New Features:

• Introduce WEBSOCKET_ALLOWED_HOSTS environment variable to whitelist remote IPs for WebSocket connections

Enhancements:

• Default to localhost addresses when WEBSOCKET_ALLOWED_HOSTS is not set

Documentation:

• Add WEBSOCKET_ALLOWED_HOSTS to .env.example

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Introduce a WEBSOCKET_ALLOWED_HOSTS environment variable to control which remote IPs can establish WebSocket connections, defaulting to localhost, and update the EIO handshake to use this dynamic list.

File-Level Changes

Change	Details	Files
Replace hardcoded localhost check with dynamic allowed hosts list	Read WEBSOCKET_ALLOWED_HOSTS or use default localhost addresses Split and trim the comma-separated hosts into an array Check if remoteAddress is in the allowed hosts array Use isAllowedHost in the EIO handshake conditional instead of isLocalhost	src/api/integrations/event/websocket/websocket.controller.ts
Update environment example to include new variable	Add WEBSOCKET_ALLOWED_HOSTS entry to .env.example	.env.example

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[sourcery-ai]

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