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47. Node.js Architecture Essentials

Server-side runtime, process object, and buffers.

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Node.js provides server-side APIs: `process.env` for configuration, `Buffer` for raw binary manipulation, and the `node:fs` module for filesystem access.

js
const privateKey = process.env.SIGNER_KEY;
if (!privateKey) throw new Error("SIGNER_KEY environment variable required");

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Check your understanding

  1. 1. Where should server credentials and private keys be read from?

  2. 2. Which Node global handles raw binary data?

  3. 3. What does process.exit(1) signal?

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