First concept

node_modules/next/dist/esm/server/lib/worker-utils.js

@@ -0,0 +1,17 @@
+import http from "http";
+export const getFreePort = async ()=>{
+    return new Promise((resolve, reject)=>{
+        const server = http.createServer(()=>{});
+        server.listen(0, ()=>{
+            const address = server.address();
+            server.close();
+            if (address && typeof address === "object") {
+                resolve(address.port);
+            } else {
+                reject(new Error("invalid address from server: " + (address == null ? void 0 : address.toString())));
+            }
+        });
+    });
+};
+
+//# sourceMappingURL=worker-utils.js.map