chore: import upstream snapshot with attribution

docs/md/how_to/javascript/nodejs_server.md

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+# Server-only via `WebSocketServer()` and Node.js
+
+For exceptionally large datasets, a `Client` can be bound to a
+`perspective.table()` instance running in Node.js/Python/Rust remotely, rather
+than creating one in a Web Worker and downloading the entire data set. This
+trades off network bandwidth and server resource requirements for a smaller
+browser memory and CPU footprint.
+
+An example in Node.js:
+
+```javascript
+const { WebSocketServer, table } = require("@perspective-dev/client");
+const fs = require("fs");
+
+// Start a WS/HTTP host on port 8080.  The `assets` property allows
+// the `WebSocketServer()` to also serves the file structure rooted in this
+// module's directory.
+const host = new WebSocketServer({ assets: [__dirname], port: 8080 });
+
+// Read an arrow file from the file system and host it as a named table.
+const arr = fs.readFileSync(__dirname + "/superstore.lz4.arrow");
+await table(arr, { name: "table_one" });
+```
+
+... and the [`Client`] implementation in the browser:
+
+```javascript
+const elem = document.getElementsByTagName("perspective-viewer")[0];
+
+// Bind to the server's worker instead of instantiating a Web Worker.
+const websocket = await perspective.websocket(
+    window.location.origin.replace("http", "ws"),
+);
+
+// Create a virtual `Table` to the preloaded data source.  `table` and `view`
+// objects live on the server.
+const server_table = await websocket.open_table("table_one");
+```