Rfactored dockerfile to reuse pipeline publish output

Dockerfile

@@ -1,27 +1,9 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
-WORKDIR /src
-
-COPY ["SampleApi/SampleApi.csproj", "SampleApi/"]
-RUN dotnet restore "SampleApi/SampleApi.csproj"
-
-COPY . .
-
-RUN dotnet publish "SampleApi/SampleApi.csproj" \
-    -c Release \
-    -o /app/publish \
-    --no-restore \
-    /p:UseAppHost=false
-
 FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 
+COPY ./SampleApi/bin/Release/net8.0/publish/ .
+
 ENV ASPNETCORE_HTTP_PORTS=8081
 EXPOSE 8081
 
-COPY --from=build /app/publish .
-
-RUN ls -la /app
-
-ENV ASPNETCORE_HTTP_PORTS=8081
-
 ENTRYPOINT ["dotnet", "SampleApi.dll"]