Add EchoServer example

examples/EchoServer.cpp

@@ -0,0 +1,32 @@
+#include "App.h"
+
+int main() {
+    /* Very simple WebSocket echo server */
+    uWS::App().ws<void>("/*", {
+        /*.compression = */true,
+        /*.maxPayloadLength*/
+
+        /*.open = */[](auto *ws, auto *req) {
+
+        },
+        /*.message = */[](auto *ws, std::string_view message, uWS::OpCode opCode) {
+            ws->send(message, opCode);
+        }
+        /*.drain = []() {
+
+        },
+        .ping = []() {
+
+        },
+        .pong = []() {
+
+        },
+        .close = []() {
+
+        }*/
+    }).listen(9001, [](auto *token) {
+        if (token) {
+            std::cout << "Listening on port " << 9001 << std::endl;
+        }
+    }).run();
+}