One of the most straightforward way is by exposing them as HTTP-based services (e.g., REST APIs) and consuming these services in the other container.
In the source container where your Node.js function resides, create an HTTP endpoint that exposes the function.
In the target container that wants to call the function from Container 1, use HTTP client libraries like axios or request in your Node.js code to call the exposed REST API.
Note that Cross-container communication often requires proper authentication and authorization.
Bluesky
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