Merge pull request 'Refactored dockerfile' (#10) from test into main

Reviewed-on: #10

Dockerfile

@@ -2,21 +2,34 @@
 FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /src
 
-# Copy the solution and all project files to restore dependencies first (better caching)
+# 1. Copy the .sln and .csproj files first to restore dependencies
+# This makes builds faster by caching the 'restore' layer
+COPY ["SampleApi/SampleApi.csproj", "SampleApi/"]
+RUN dotnet restore "SampleApi/SampleApi.csproj"
+
+# 2. Copy the rest of the code
 COPY . .
 
-# Run publish. 
+# 3. Publish to a FLAT directory
-# We use --no-self-contained to keep it small since the runtime image has the shared framework.
+# We use -o /app/publish and ensure no extra subfolders are created
-RUN dotnet publish "SampleApi/SampleApi.csproj" -c Release -o /app/publish /p:UseAppHost=false
+RUN dotnet publish "SampleApi/SampleApi.csproj" \
+    -c Release \
+    -o /app/publish \
+    --no-restore \
+    /p:UseAppHost=false
 
 # STAGE 2: Runtime
 FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 
-# Copy the contents of the publish folder directly into /app
+# Copy the contents directly
 COPY --from=build /app/publish .
 
-# Pro-tip: Ensure the port matches your docker-compose
+# DEBUG: This will print the contents of /app during the build.
+# If SampleApi.dll isn't in this list, the build will stop here.
+RUN ls -la /app
+
+# Set the environment to listen on the port you mapped in Compose
 ENV ASPNETCORE_HTTP_PORTS=8081
 
 ENTRYPOINT ["dotnet", "SampleApi.dll"]