Speed up scratch image builds with publish-first contexts

docs/dev/DEV_ENVIRONMENT_SETUP.md

@@ -31,6 +31,8 @@ Setup scripts validate prerequisites, build solutions and Docker images, and lau
 
 The scripts will check for required tools (dotnet 10.x, node 20+, npm 10+, docker, git), warn about missing hosts file entries, and copy `.env` from the example if needed. See the manual steps below for details on each stage.
 
+On Windows and Linux, the backend image builder now publishes each selected .NET service locally and builds the hardened runtime image from a small temporary context. That avoids repeatedly streaming the whole monorepo into Docker during scratch setup.
+
 ### Quick validation + demo seed (first-run path)
 
 ```powershell
@@ -197,6 +199,18 @@ dotnet test  src\Scanner\StellaOps.Scanner.sln
 ./scripts/build-all-solutions.sh --test
 ```
 
+### Targeted backend image rebuilds
+
+```powershell
+.\devops\docker\build-all.ps1 -Services notify-web,advisory-ai-web
+```
+
+```bash
+SERVICES=notify-web,advisory-ai-web ./devops/docker/build-all.sh
+```
+
+Use this after scoped backend changes instead of re-running the full image matrix.
+
 ### Module solution index
 
 See [`docs/dev/SOLUTION_BUILD_GUIDE.md`](SOLUTION_BUILD_GUIDE.md) for the authoritative list. Current modules (39):