当服务器应用程序在 docker 上运行时，SignalR 客户端无法连接到集线器

Question

我的 SignalR 集线器位于 dockerized 应用程序中，客户端位于另一台服务器和 docker 网络之外。 SignalR 服务器应用程序的端口 80 和 443 已公开并发布。它接受 GET 请求，但客户端无法连接到集线器。 Docker 是否有 websocket 连接的问题？如何解决？

Dockerfile

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS build
WORKDIR /src
COPY ["src/Services/ChatRoom/ByCheck.Services.ChatRoom/ByCheck.Services.ChatRoom.csproj", "src/Services/ChatRoom/ByCheck.Services.ChatRoom/"]
RUN dotnet restore "src/Services/ChatRoom/ByCheck.Services.ChatRoom/ByCheck.Services.ChatRoom.csproj"
COPY . .
WORKDIR "/src/src/Services/ChatRoom/ByCheck.Services.ChatRoom"
RUN dotnet build "ByCheck.Services.ChatRoom.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "ByCheck.Services.ChatRoom.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "ByCheck.Services.ChatRoom.dll"]

docker-compose

  chatroom:
    image: ${DOCKER_REGISTRY-}chatroom
    container_name: bycheck.services.chatroom
    build:
      context: .
      dockerfile: src/Services/ChatRoom/ByCheck.Services.ChatRoom/Dockerfile
    restart: ${RESTART_POLICY}
    ports:
      - "5060:80"
    environment:
      - ASPNETCORE_ENVIRONMENT=Development
      - ASPNETCORE_URLS=http://+:80
    volumes:
      - type: bind
        source: ${APPDATA}/Microsoft/UserSecrets
        target: /root/.microsoft/usersecrets
        read_only: false
      - type: bind
        source:  ${APPDATA}/ASP.NET/DataProtection-Keys
        target: /root/.aspnet/DataProtection-Keys
        read_only: false