Каркас проекта: ТЗ, nginx+gameserver(uWebSockets) в Docker, /ws echo

Frontend — чистый HTML/CSS/JS без сборки (резюме, проекты, игра-заглушки).
Gameserver — C++ на uWebSockets (CMake FetchContent), протокол hello/lobby.list_rooms/error проверен end-to-end.

gameserver/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+project(cactoz_gameserver CXX C)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+include(FetchContent)
+
+FetchContent_Declare(
+  uwebsockets
+  GIT_REPOSITORY https://github.com/uNetworking/uWebSockets.git
+  GIT_TAG v20.79.0
+)
+FetchContent_MakeAvailable(uwebsockets)
+
+# uWebSockets pulls uSockets in via a git submodule, which plain FetchContent
+# does not check out. Fetch the exact commit uWebSockets v20.79.0 pins instead.
+FetchContent_Declare(
+  usockets_src
+  GIT_REPOSITORY https://github.com/uNetworking/uSockets.git
+  GIT_TAG 86097c490263ab662d62e8e7b541390bdec7d149
+)
+FetchContent_MakeAvailable(usockets_src)
+
+FetchContent_Declare(
+  json
+  GIT_REPOSITORY https://github.com/nlohmann/json.git
+  GIT_TAG v3.12.0
+)
+FetchContent_MakeAvailable(json)
+
+file(GLOB USOCKETS_SOURCES
+  ${usockets_src_SOURCE_DIR}/src/*.c
+  ${usockets_src_SOURCE_DIR}/src/eventing/*.c
+)
+add_library(usockets STATIC ${USOCKETS_SOURCES})
+target_include_directories(usockets PUBLIC ${usockets_src_SOURCE_DIR}/src)
+target_compile_definitions(usockets PUBLIC LIBUS_NO_SSL LIBUS_USE_EPOLL)
+
+add_executable(gameserver
+  src/main.cpp
+)
+target_include_directories(gameserver PRIVATE
+  ${uwebsockets_SOURCE_DIR}/src
+  src
+)
+target_link_libraries(gameserver PRIVATE usockets nlohmann_json::nlohmann_json pthread z)

gameserver/Dockerfile

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+FROM debian:bookworm AS build
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential cmake git ca-certificates zlib1g-dev \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY CMakeLists.txt ./
+COPY src ./src
+RUN cmake -B build -DCMAKE_BUILD_TYPE=Release && cmake --build build -j"$(nproc)"
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y --no-install-recommends zlib1g \
+    && rm -rf /var/lib/apt/lists/*
+COPY --from=build /app/build/gameserver /usr/local/bin/gameserver
+EXPOSE 9001
+CMD ["gameserver"]

gameserver/src/main.cpp

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+// Каркас (этап 1 из TZ.md): проверка связки nginx <-ws-> gameserver.
+// Лобби/комнаты/игровая логика — следующие этапы.
+
+#include <App.h>
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+struct PerSocketData {};
+
+int main() {
+    uWS::App()
+        .ws<PerSocketData>("/ws", {
+            .open = [](auto *ws) {
+                std::cout << "client connected\n";
+            },
+            .message = [](auto *ws, std::string_view message, uWS::OpCode) {
+                json response;
+                try {
+                    json request = json::parse(message);
+                    std::string type = request.value("type", "");
+
+                    if (type == "hello") {
+                        response = {{"type", "hello.ack"}, {"payload", {{"player_id", "stub"}}}};
+                    } else if (type == "lobby.list_rooms") {
+                        response = {{"type", "lobby.rooms"}, {"payload", {{"rooms", json::array()}}}};
+                    } else {
+                        response = {{"type", "error"},
+                                     {"payload", {{"code", "unknown_type"}, {"message", "unknown message type: " + type}}}};
+                    }
+                } catch (const std::exception &e) {
+                    response = {{"type", "error"}, {"payload", {{"code", "bad_json"}, {"message", e.what()}}}};
+                }
+                ws->send(response.dump(), uWS::OpCode::TEXT);
+            },
+            .close = [](auto *ws, int, std::string_view) {
+                std::cout << "client disconnected\n";
+            },
+        })
+        .listen(9001, [](auto *token) {
+            if (token) {
+                std::cout << "gameserver listening on :9001\n";
+            } else {
+                std::cerr << "failed to listen on :9001\n";
+            }
+        })
+        .run();
+}