Add signalr

src/backend/server/Todo/Todo.Api/.dockerignore

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+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/.idea
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

src/backend/server/Todo/Todo.Api/Dockerfile

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+FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
+WORKDIR /src
+COPY ["Todo.Api/Todo.Api.csproj", "Todo.Api/"]
+RUN dotnet restore "Todo.Api/Todo.Api.csproj"
+COPY . .
+WORKDIR "/src/Todo.Api"
+RUN dotnet build "Todo.Api.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "Todo.Api.csproj" -c Release -o /app/publish
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "Todo.Api.dll"]

src/backend/server/Todo/Todo.Api/Hubs/TodoHub.cs

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+using System.Threading.Tasks;
+using Microsoft.AspNetCore.SignalR;
+
+namespace Todo.Api.Hubs
+{
+    public class TodoHub : Hub
+    {
+        public async Task GetInboxTodos()
+        {
+            await Clients.Caller.SendAsync("InboxTodos", "some data");
+        }
+    }
+}

src/backend/server/Todo/Todo.Api/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace Todo.Api
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateHostBuilder(args).Build().Run();
+        }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); });
+    }
+}

src/backend/server/Todo/Todo.Api/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:12063",
+      "sslPort": 44373
+    }
+  },
+  "profiles": {
+    "Todo.Api": {
+      "commandName": "Project",
+      "dotnetRunMessages": "true",
+      "launchBrowser": false,
+      "launchUrl": "swagger",
+      "applicationUrl": "https://localhost:5001;http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

src/backend/server/Todo/Todo.Api/Startup.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.HttpsPolicy;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using Microsoft.OpenApi.Models;
+using Todo.Api.Hubs;
+
+namespace Todo.Api
+{
+    public class Startup
+    {
+        public Startup(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        public IConfiguration Configuration { get; }
+
+        // This method gets called by the runtime. Use this method to add services to the container.
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddControllers();
+            services.AddCors(options =>
+            {
+                options.AddDefaultPolicy(builder =>
+                    builder.WithOrigins("http://localhost:3000")
+                        .AllowCredentials()
+                        .AllowAnyHeader()
+                        .AllowAnyMethod());
+            });
+
+            services.AddSwaggerGen(c =>
+            {
+                c.SwaggerDoc("v1", new OpenApiInfo { Title = "Todo.Api", Version = "v1" });
+            });
+
+            services.AddSignalR();
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+                app.UseSwagger();
+                app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "Todo.Api v1"));
+            }
+
+            app.UseHttpsRedirection();
+
+            app.UseRouting();
+            app.UseCors();
+
+            app.UseAuthorization();
+
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapControllers();
+                endpoints.MapHub<TodoHub>("/hubs/todo");
+            });
+        }
+    }
+}

src/backend/server/Todo/Todo.Api/Todo.Api.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net5.0</TargetFramework>
+        <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Swashbuckle.AspNetCore" Version="5.6.3" />
+    </ItemGroup>
+
+</Project>

src/backend/server/Todo/Todo.Api/WeatherForecast.cs

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+using System;
+
+namespace Todo.Api
+{
+    public class WeatherForecast
+    {
+        public DateTime Date { get; set; }
+
+        public int TemperatureC { get; set; }
+
+        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+
+        public string Summary { get; set; }
+    }
+}

src/backend/server/Todo/Todo.Api/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

src/backend/server/Todo/Todo.Api/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+  "AllowedHosts": "*"
+}