Currently I’m working on a backend with GraphQL and Hot Chocolate.

The backend gets data from openweathermap.org.

If I’m running dotnet run locally everything is fine. I can see the interface of Banana Cake (http://localhost:5000/graphql).
Now I want to use a docker for this. So I’ve created a Dockerfile and build my container and run it. It is also working. But I can’t connect to the graphql interface.

Startup.cs file

using HotChocolate.AspNetCore.Playground;

namespace WeatherBackend
{
        public class Startup
        {
                private readonly IWebHostEnvironment _env;

        public Startup(IWebHostEnvironment env)
        {
            _env = env;
        }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
            services.AddHttpClient<WeatherService>();
            services.AddGraphQLServer()
                .AddQueryType<WeatherQueryType>()
                .AddApolloTracing()
                .AddType<WeatherType>()
                .ModifyRequestOptions(opt => opt.IncludeExceptionDetails = _env.IsDevelopment());
            
            services.AddOptions();
            services.Configure<OpenWeatherMapOptions>(options =>
            {
                options.ApiKey = Environment.GetEnvironmentVariable("OpenWeatherMapApiKey");;
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseHttpsRedirection();
            app.UseRouting();
            app.UseAuthorization();
            app.UseCors(builder =>
            {
                builder.AllowAnyOrigin()
                       .AllowAnyHeader()
                       .AllowAnyMethod();
            });
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapGraphQL("/graphql");
            });
        }
    }
}

Dockerfile:

FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
WORKDIR /app

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
ARG configuration=Release
WORKDIR /src
COPY ["WeatherBackend.csproj", "./"]
RUN dotnet restore "WeatherBackend.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "WeatherBackend.csproj" -c $configuration -o /app/build

FROM build AS publish
ARG configuration=Release
RUN dotnet publish "WeatherBackend.csproj" -c $configuration -o /app/publish /p:UseAppHost=false

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

Running docker build -t weather-backend-image . and than docker run -p 8080:5000 weather-backend-image:latest and than connecting to http://localhost:5000/graphql no Banana Cake Interface is seen.

Can someone please help to dockerize my backend, please.