diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..f0895cc
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,14 @@
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+
+COPY ["Francesco.Recipes.World/Francesco.Recipes.World.csproj", "Francesco.Recipes.World/"]
+RUN dotnet restore "Francesco.Recipes.World/Francesco.Recipes.World.csproj"
+
+COPY . .
+WORKDIR "/src/Francesco.Recipes.World"
+RUN dotnet publish "Francesco.Recipes.World.csproj" -c Release -o /app/publish
+
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
+WORKDIR /app
+COPY --from=build /app/publish .
+ENTRYPOINT ["dotnet", "Francesco.Recipes.World.dll"]
diff --git a/Francesco.Recipes.World/Controller/ShoppingList/ShoppingListController.cs b/Francesco.Recipes.World/Controller/ShoppingList/ShoppingListController.cs
index a1494a7..8922abd 100644
--- a/Francesco.Recipes.World/Controller/ShoppingList/ShoppingListController.cs
+++ b/Francesco.Recipes.World/Controller/ShoppingList/ShoppingListController.cs
@@ -32,14 +32,52 @@
                 return BadRequest("No ingredients provided.");
             }
 
-            var shoppingList = await _shoppingListRepository.AddIngredientsToShoppingListAsync(request.RecipeId, request.IngredientIds);
+            // Compute duplicates for this recipe in the current shopping list
+            var existingShoppingList = await _context.ShoppingLists
+                .Include(sl => sl.RecipeShoppingList)
+                    .ThenInclude(rsl => rsl.SelectedIngredients)
+                        .ThenInclude(si => si.RecipeIngredient)
+                .Include(sl => sl.RecipeShoppingList)
+                    .ThenInclude(rsl => rsl.Recipe)
+                .FirstOrDefaultAsync(sl => sl.RecipeShoppingList.Any(rsl => rsl.Recipe.Id == request.RecipeId));
+
+            var existingForRecipe = existingShoppingList?
+                .RecipeShoppingList.FirstOrDefault(rsl => rsl.Recipe.Id == request.RecipeId);
+
+            var existingIds = existingForRecipe?.SelectedIngredients
+                .Where(si => si.RecipeIngredient != null)
+                .Select(si => si.RecipeIngredient.Id)
+                .ToHashSet() ?? new HashSet<Guid>();
+
+            var skippedExisting = request.IngredientIds.Where(id => existingIds.Contains(id)).Distinct().ToList();
+            var ingredientIdsToAdd = request.IngredientIds.Except(skippedExisting).Distinct().ToList();
+
+            if (ingredientIdsToAdd.Count == 0)
+            {
+                return Json(new
+                {
+                    shoppingListId = existingShoppingList?.Id,
+                    skippedExisting,
+                    addedCount = 0,
+                    skippedCount = skippedExisting.Count,
+                    noAdditions = true,
+                });
+            }
+
+            var shoppingList = await _shoppingListRepository.AddIngredientsToShoppingListAsync(request.RecipeId, ingredientIdsToAdd);
 
             if (shoppingList == null)
             {
                 return BadRequest("Error creating shopping list.");
             }
 
-            return Json(new { shoppingListId = shoppingList.Id });
+            return Json(new
+            {
+                shoppingListId = shoppingList.Id,
+                skippedExisting,
+                addedCount = ingredientIdsToAdd.Count,
+                skippedCount = skippedExisting.Count,
+            });
         }
 
         [HttpGet("RecipeCount")]
diff --git a/Francesco.Recipes.World/Views/Recipe/Details.cshtml b/Francesco.Recipes.World/Views/Recipe/Details.cshtml
index 65a7001..1546875 100644
--- a/Francesco.Recipes.World/Views/Recipe/Details.cshtml
+++ b/Francesco.Recipes.World/Views/Recipe/Details.cshtml
@@ -196,10 +196,28 @@
 						})
 						.then(result => {
 							localStorage.setItem('shoppingListId', result.shoppingListId);
-							alert('Einkaufsliste aktualisiert.');
+							const showInfo = (msg) => {
+								if (window.Swal) {
+									Swal.fire({ icon: 'info', title: 'Hinweis', text: msg, timer: 1800, showConfirmButton: false });
+								} else { alert(msg); }
+							};
+
+							if (result.skippedCount && result.skippedCount > 0) {
+								if (result.addedCount && result.addedCount > 0) {
+									showInfo(`Einkaufsliste aktualisiert. ${result.skippedCount} Zutaten waren bereits vorhanden und wurden übersprungen.`);
+								} else {
+									showInfo('Diese Zutaten sind bereits in der Einkaufsliste vorhanden.');
+								}
+							} else {
+								showInfo('Einkaufsliste aktualisiert.');
+							}
 						})
 						.catch(error => {
-							alert('Fehler beim Aktualisieren der Einkaufsliste.');
+							if (window.Swal) {
+								Swal.fire({ icon: 'error', title: 'Fehler', text: 'Fehler beim Aktualisieren der Einkaufsliste.' });
+							} else {
+								alert('Fehler beim Aktualisieren der Einkaufsliste.');
+							}
 						});
 					};
 				});
diff --git a/Francesco.Recipes.World/Views/ShoppingList/Details.cshtml b/Francesco.Recipes.World/Views/ShoppingList/Details.cshtml
index a816f60..6c7f383 100644
--- a/Francesco.Recipes.World/Views/ShoppingList/Details.cshtml
+++ b/Francesco.Recipes.World/Views/ShoppingList/Details.cshtml
@@ -13,7 +13,7 @@
 				id = ri.Id,
 				name = ri.Ingredient.Name,
 				amount = ri.Quantity,
-				unit = ri.Unit.Name,
+				unit = ri.Unit.Symbol,
 				shoppingListId = Model.RecipeIngredientToShoppingListMap.ContainsKey(ri.Id)
 					? Model.RecipeIngredientToShoppingListMap[ri.Id]
 					: Guid.Empty
@@ -104,3 +104,4 @@
 	</script>
 	<script src="~/js/site.js"></script>
 }
+
diff --git a/Francesco.Recipes.World/appsettings.Production.json b/Francesco.Recipes.World/appsettings.Production.json
new file mode 100644
index 0000000..0cddf7c
--- /dev/null
+++ b/Francesco.Recipes.World/appsettings.Production.json
@@ -0,0 +1,11 @@
+{
+  "ConnectionStrings": {
+    "FrancescosRecipesWorldDbContextConnection": "Server=sqlserver-recipes,1433;Database=Francesco.Recipes.World;User Id=sa;Password=YourRecipesPassword123!;TrustServerCertificate=True;MultipleActiveResultSets=true"
+  },
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..53f52c5
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,48 @@
+networks:
+  recipesnet-dev:
+    driver: bridge
+
+services:
+
+  francescos-recipes-world:
+    container_name: francescos-recipes-world-dev
+    depends_on:
+      sqlserver-recipes:
+        condition: service_healthy
+    environment:
+      - ASPNETCORE_ENVIRONMENT=Production
+      - TZ=Europe/Zurich
+      - ConnectionStrings__FrancescosRecipesWorldDbContextConnection=Server=sqlserver-recipes,1433;Database=Francesco.Recipes.World;User Id=sa;Password=YourRecipesPassword123!;TrustServerCertificate=True;MultipleActiveResultSets=true
+    image: francesco448/francescos.recipes.world:latest
+    networks:
+      - recipesnet-dev
+    ports:
+      - '9003:8080'
+    restart: unless-stopped
+    volumes:
+      - /mnt/PoolHDD/AppData/Francescos--Recipes-World/app:/app
+    working_dir: /app
+
+  sqlserver-recipes:
+    container_name: sqlserver-recipes-dev
+    environment:
+      - ACCEPT_EULA=Y
+      - SA_PASSWORD=YourRecipesPassword123!
+    healthcheck:
+      interval: 10s
+      retries: 10
+      start_period: 30s
+      test:
+        - CMD-SHELL
+        - >-
+          /opt/mssql-tools18/bin/sqlcmd -S localhost -U sa -P YourRecipesPassword123!
+          -Q 'SELECT 1' -No
+      timeout: 5s
+    image: mcr.microsoft.com/mssql/server:2022-latest
+    networks:
+      - recipesnet-dev
+    ports:
+      - '1702:1433'
+    restart: unless-stopped
+    volumes:
+      - /mnt/PoolHDD/AppData/Francescos--Recipes-World/sqlserver:/var/opt/mssql