Fix running in docker

UsfmScannerNet/Dockerfile

@@ -1,5 +1,4 @@
-FROM mcr.microsoft.com/dotnet/runtime:10.0 AS base
-USER $APP_UID
+FROM mcr.microsoft.com/dotnet/runtime:10.0 AS base
 WORKDIR /app
 
 FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
@@ -13,9 +12,26 @@ RUN dotnet build "./UsfmScannerNet.csproj" -c $BUILD_CONFIGURATION -o /app/build
 
 FROM build AS publish
 ARG BUILD_CONFIGURATION=Release
+# Publish the application
 RUN dotnet publish "./UsfmScannerNet.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
+# Install CSnakes.Stage tool to get the Python redistributable (which includes libcsnakes_python.so)
+RUN dotnet tool install --global CSnakes.Stage
+ENV PATH="/root/.dotnet/tools:${PATH}"
+# Setup Python redistributable - this downloads Python + libcsnakes_python.so
+RUN setup-python --python 3.12 --venv /app/python-env --pip-requirements /src/UsfmScannerNet/requirements.txt --verbose
 
 FROM base AS final
 WORKDIR /app
+ENV InContainer=true
+ENV PythonHome=/app
+# Copy the application
 COPY --from=publish /app/publish .
+# Copy Python virtual environment from build stage
+COPY --from=publish /app/python-env /app/python-env
+# Copy CSnakes redistributable to a location accessible to the app user
+# CSnakes looks in ~/.config/CSnakes, so we copy to /home/app/.config/CSnakes
+COPY --from=publish /root/.config/CSnakes /home/app/.config/CSnakes
+# Set proper permissions  
+RUN chown -R $APP_UID:$APP_UID /app /home/app/.config
+USER $APP_UID
 ENTRYPOINT ["dotnet", "UsfmScannerNet.dll"]

UsfmScannerNet/Program.cs

@@ -1,4 +1,4 @@
-using CSnakes.Runtime;
+using CSnakes.Runtime;
 using Microsoft.Extensions.Azure;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -23,11 +23,18 @@ static void Main(string[] args)
         {
             config.DefaultRequestHeaders.Add("User-Agent", "UsfmScannerNet");
         });
-        builder.Services.WithPython()
+        var pythonHome = builder.Configuration.GetValue("PythonHome", ".");
+        var inContainer = builder.Configuration.GetValue<bool>("InContainer");
+
+        var pythonBuilder = builder.Services.WithPython()
             .WithHome(".")
-            .WithVirtualEnvironment("python-env")
             .FromRedistributable()
-            .WithPipInstaller();
+            .WithVirtualEnvironment(Path.Join(pythonHome, "python-env"));
+
+        if (!inContainer)
+        {
+            pythonBuilder.WithPipInstaller();
+        }
         var app = builder.Build();
         app.Run();
     }

UsfmScannerNet/UsfmScannerNet.csproj

@@ -26,7 +26,7 @@
 
     <ItemGroup>
       <PackageReference Include="Azure.Messaging.ServiceBus" Version="7.20.1" />
-      <PackageReference Include="Azure.Storage.Blobs" Version="12.27.0" />
+      <PackageReference Include="Azure.Storage.Blobs" Version="12.25.1" />
       <PackageReference Include="BTTWriterLib" Version="0.10.1" />
       <PackageReference Include="CSnakes.Runtime" Version="1.2.1" />
       <PackageReference Include="Microsoft.Extensions.Azure" Version="1.13.1" />