Refactor test setup and improve output handling (dotnet#940)

* Update test configurations for better output clarity
* Enhance test execution with detailed logging
* Fix issues related to test execution in the latest environment

Author: tmy2017

.devcontainer/Dockerfile

@@ -0,0 +1,5 @@
+FROM mcr.microsoft.com/devcontainers/base:ubuntu-24.04
+
+# use this Dockerfile to install additional tools you might need, e.g.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/devcontainer.json

@@ -0,0 +1,31 @@
+// See https://aka.ms/devcontainer.json for format details.
+{
+  "name": "eShop (.NET)",
+
+  // Use the official .NET dev container image (includes SDK, tools, and common dependencies).
+  "image": "mcr.microsoft.com/devcontainers/dotnet:10.0",
+
+  // Container-specific settings.
+  "settings": {
+    "terminal.integrated.shell.linux": "/bin/bash",
+    "dotnet.defaultSolution": "eShop.sln"
+  },
+
+  // Add useful extensions for .NET development.
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-dotnettools.csharp",
+        "ms-azuretools.vscode-docker",
+        "editorconfig.editorconfig",
+        "formulahendry.dotnet-test-explorer"
+      ]
+    }
+  },
+
+  // Ports commonly used by ASP.NET Core apps; adjust per service as needed.
+  "forwardPorts": [5000, 5001],
+
+  // Run after the container is created.
+  "postCreateCommand": "dotnet restore"
+}