integration: add cluster setup and configuration and a few tests

integration/backends/httpdetails/index.js

@@ -0,0 +1,29 @@
+const http = require("http");
+
+const requestListener = function (req, res) {
+  const {
+    pathname: path,
+    hostname: host,
+    port: port,
+    search: query,
+    hash: hash,
+  } = new URL(req.url, `http://${req.headers.host}`);
+
+  res.setHeader("Content-Type", "application/json");
+  res.writeHead(200);
+  res.end(
+    JSON.stringify({
+      headers: req.headers,
+      method: req.method,
+      host: host,
+      port: port,
+      path: path,
+      query: query,
+      hash: hash,
+    })
+  );
+};
+
+const server = http.createServer(requestListener);
+console.log("starting http server on :8080");
+server.listen(8080);