chore: import upstream snapshot with attribution

fixtures/interactive-dev-tests/container-app/container/simple-node-app.js

@@ -0,0 +1,49 @@
+const { createServer } = require("http");
+
+const webSocketEnabled = process.env.WS_ENABLED === "true";
+
+// Create HTTP server
+const server = createServer(function (req, res) {
+	if (req.url === "/ws") {
+		// WebSocket upgrade will be handled by the WebSocket server
+		return;
+	}
+
+	res.writeHead(200, { "Content-Type": "text/plain" });
+	res.write("Hello World! Have an env var! " + process.env.MESSAGE);
+	res.end();
+});
+
+// Check if WebSocket functionality is enabled
+if (webSocketEnabled) {
+	const WebSocket = require("ws");
+
+	// Create WebSocket server
+	const wss = new WebSocket.Server({
+		server: server,
+		path: "/ws",
+	});
+
+	wss.on("connection", function connection(ws) {
+		console.log("WebSocket connection established");
+
+		ws.on("message", function message(data) {
+			console.log("Received:", data.toString());
+			// Echo the message back with prefix
+			ws.send("Echo: " + data.toString());
+		});
+
+		ws.on("close", function close() {
+			console.log("WebSocket connection closed");
+		});
+
+		ws.on("error", console.error);
+	});
+}
+
+server.listen(8080, function () {
+	console.log("Server listening on port 8080");
+	if (webSocketEnabled) {
+		console.log("WebSocket support enabled");
+	}
+});