devops: added dockerfile and other configs

Dockerfile

@@ -0,0 +1,42 @@
+# ===== Build stage =====
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+
+# Usaremos la config de NuGet de la raíz (BaGet + nuget.org)
+COPY nuget.config ./
+
+# Copiamos SOLO los .csproj primero (mejor caché en restore)
+COPY Core.Inventory.Service.API/Core.Inventory.Service.API.csproj Core.Inventory.Service.API/
+COPY Core.Inventory.Application/Core.Inventory.Application.csproj Core.Inventory.Application/
+COPY Core.Inventory.External/Core.Inventory.External.csproj Core.Inventory.External/
+
+# Restaura con tu nuget.config
+RUN dotnet restore Core.Inventory.Service.API/Core.Inventory.Service.API.csproj --configfile ./nuget.config
+
+# Ahora sí, copia todo el código
+COPY . .
+
+# Publica artefactos (sin apphost para imagen más pequeña)
+ARG BUILD_CONFIGURATION=Release
+RUN dotnet publish Core.Inventory.Service.API/Core.Inventory.Service.API.csproj \
+    -c $BUILD_CONFIGURATION -o /app/out /p:UseAppHost=false
+
+# ===== Runtime stage =====
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
+WORKDIR /app
+
+# Copiamos el publish
+COPY --from=build /app/out .
+
+# Variables típicas (ajústalas luego en compose)
+ENV ASPNETCORE_URLS=http://+:8080 \
+    ASPNETCORE_ENVIRONMENT=Production
+
+# Exponemos el puerto HTTP
+EXPOSE 8080
+
+# Opcional: healthcheck si tienes /health
+# HEALTHCHECK --interval=30s --timeout=5s --retries=5 \
+#   CMD wget -qO- http://localhost:8080/health || exit 1
+
+ENTRYPOINT ["dotnet", "Core.Inventory.Service.API.dll"]