feat: add Docker support for EchoHub.Server with Dockerfile and docker-compose.yml

src/EchoHub.Server/.dockerignore

@@ -0,0 +1,6 @@
+bin/
+obj/
+.vs/
+*.user
+*.suo
+*.DotSettings.user

src/EchoHub.Server/Dockerfile

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+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+# Copy project files first for layer caching
+COPY EchoHub.Core/EchoHub.Core.csproj EchoHub.Core/
+COPY EchoHub.Server.Irc/EchoHub.Server.Irc.csproj EchoHub.Server.Irc/
+COPY EchoHub.Server/EchoHub.Server.csproj EchoHub.Server/
+COPY Directory.Build.props .
+RUN dotnet restore EchoHub.Server/EchoHub.Server.csproj
+
+# Copy everything and publish
+COPY EchoHub.Core/ EchoHub.Core/
+COPY EchoHub.Server.Irc/ EchoHub.Server.Irc/
+COPY EchoHub.Server/ EchoHub.Server/
+RUN dotnet publish EchoHub.Server/EchoHub.Server.csproj -c Release -o /app/publish --no-restore
+
+# Runtime
+FROM mcr.microsoft.com/dotnet/aspnet:10.0 AS runtime
+WORKDIR /app
+
+RUN groupadd -r echohub && useradd -r -g echohub -d /app echohub \
+    && mkdir -p /app/data \
+    && chown -R echohub:echohub /app
+
+COPY --from=build --chown=echohub:echohub /app/publish .
+
+USER echohub
+
+ENV ASPNETCORE_ENVIRONMENT=Production \
+    Urls=http://0.0.0.0:5000 \
+    ConnectionStrings__DefaultConnection="Data Source=/app/data/echohub.db" \
+    Storage__Path=/app/data/uploads \
+    Serilog__WriteTo__1__Args__path=/app/data/logs/echohub-server-.log
+
+EXPOSE 5000 6667 6697
+
+ENTRYPOINT ["dotnet", "EchoHub.Server.dll"]