fix: Update Dockerfile to restore dependencies using project file instead of solution file

Author: Starefossen

quotes-analytics/Dockerfile

@@ -1,33 +1,14 @@
-# Build stage
 FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /src
-
-# Copy solution and project files
-COPY quotes-analytics.sln .
 COPY quotes-analytics.csproj .
-
-# Restore dependencies
-RUN dotnet restore quotes-analytics.sln
-
-# Copy source code (excluding tests via .dockerignore)
+RUN dotnet restore quotes-analytics.csproj
 COPY . .
-
-# Build and publish
 RUN dotnet publish quotes-analytics.csproj -c Release -o /app/publish --no-restore
 
-# Runtime stage
 FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
 WORKDIR /app
-
-# Copy published app
 COPY --from=build /app/publish .
-
-# Expose port
 EXPOSE 8081
-
-# Set environment variables for OpenTelemetry
 ENV ASPNETCORE_URLS=http://+:8081
 ENV DOTNET_SYSTEM_NET_HTTP_SOCKETSHTTPHANDLER_HTTP2UNENCRYPTEDSUPPORT=true
-
-# Run the application
 ENTRYPOINT ["dotnet", "quotes-analytics.dll"]