Docker compose / Fix build ?

LaDOSE.Src/Dockerfile

@@ -1,15 +1,44 @@
-FROM microsoft/dotnet:sdk AS build-env
+# Builds the LaDOSE.Api image. Context is LaDOSE.Src (see .dockerignore next to this file).
+#
+# Only LaDOSE.Api is published. LaDOSE.linux.sln also carries the Avalonia desktop app,
+# the Discord bot and LinuxTest, and `dotnet publish <sln> -o out` flattens every project
+# into that one directory — which is why the previous version of this file copied from
+# /app/LaDOSE.Api/out/ and found nothing there.
+ARG DOTNET_VERSION=9.0
+
+FROM mcr.microsoft.com/dotnet/sdk:${DOTNET_VERSION} AS build
+WORKDIR /src
+
+# Debug is deliberate for local work, and docker-compose.yml passes it: the OpenAPI
+# document and the Scalar UI are gated behind `#if DEBUG` in Startup.cs *and* behind
+# Condition="'$(Configuration)' == 'Debug'" on their PackageReferences in
+# LaDOSE.Api.csproj. A Release image therefore serves no /openapi/v1.json, which is
+# exactly what LaDOSE.WebApp's `npm run api:sync` reads. Default stays Release.
+ARG BUILD_CONFIGURATION=Release
+
+# Project files first so this layer survives every .cs edit. Restore has to run under
+# the same Configuration as the publish below, or the conditional PackageReferences
+# above make the two disagree about which packages the assets file should contain.
+COPY global.json ./
+COPY LaDOSE.Api/LaDOSE.Api.csproj LaDOSE.Api/
+COPY LaDOSE.DTO/LaDOSE.DTO.csproj LaDOSE.DTO/
+COPY LaDOSE.Entity/LaDOSE.Entity.csproj LaDOSE.Entity/
+COPY LaDOSE.Service/LaDOSE.Business.csproj LaDOSE.Service/
+RUN dotnet restore LaDOSE.Api/LaDOSE.Api.csproj -p:Configuration=${BUILD_CONFIGURATION}
+
+# Libraries/ChallongeCSharpDriver.dll is a HintPath reference from LaDOSE.Business,
+# so the build needs the whole tree, not just the projects listed above.
+COPY . .
+RUN dotnet publish LaDOSE.Api/LaDOSE.Api.csproj -c ${BUILD_CONFIGURATION} --no-restore -o /app/out
+
+FROM mcr.microsoft.com/dotnet/aspnet:${DOTNET_VERSION}
 WORKDIR /app
+COPY --from=build /app/out/ ./
 
-# Copy everything else and build
-COPY . ./
-
-RUN dotnet publish LaDOSE.linux.sln -c Release -o out
-
-# Build runtime image
-FROM microsoft/dotnet:aspnetcore-runtime
-WORKDIR /app
-COPY --from=build-env /app/LaDOSE.Api/out/ .
+# Fixed in the image on purpose. Program.cs binds Kestrel from appsettings.json's
+# AllowedHosts/Port through a ConfigurationBuilder that reads *only* that file, so a
+# Port env var would not move the listener — remap on the host side instead.
+# Everything Startup.cs reads does honour env vars (ConnectionStrings__DbContext,
+# ApiKey__SmashApiKey, ApiKey__ChallongeApiKey, JWTTokenSecret).
 EXPOSE 5000
 ENTRYPOINT ["dotnet", "LaDOSE.Api.dll"]
-