initial

README.md

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+```sh
+git clone <url>
+cd <dir>
+docker compose up -d --build
+```

docker-compose.yml

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+services:
+  dotnet:
+    build: ./dotnet
+    environment:
+      - PORT=5000
+    ports:
+      - "5000:5000"

dotnet/.dockerignore

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+.git
+.gitignore
+obj
+bin
+Properties
+appsettings*

dotnet/.gitignore

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+obj
+bin
+Properties
+appsettings*

dotnet/Dockerfile

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+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+
+WORKDIR /src
+COPY *.csproj .
+RUN dotnet restore
+
+COPY . .
+CMD ["dotnet", "run"]

dotnet/Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+var app = builder.Build();
+
+var port = Environment.GetEnvironmentVariable("PORT") ?? "5000";
+var url = $"http://0.0.0.0:{port}";
+
+app.MapGet("", () => "Hello World!");
+
+app.Run(url);

dotnet/dotnet.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+</Project>