Update devcontainer to Dotnet 8 (#1630)

* update container definition

* reference latest dotnet 8 container

.devcontainer/Dockerfile

@@ -1,9 +0,0 @@
-# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.203.0/containers/dotnet/.devcontainer/base.Dockerfile
-
-# [Choice] .NET version: 6.0, 5.0, 3.1, 6.0-bullseye, 5.0-bullseye, 3.1-bullseye, 6.0-focal, 5.0-focal, 3.1-focal
-ARG VARIANT="6.0-bullseye-slim"
-FROM mcr.microsoft.com/vscode/devcontainers/dotnet:0-${VARIANT}
-
-# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
-ARG NODE_VERSION="none"
-RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi

.devcontainer/devcontainer.json

@@ -1,29 +1,29 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
-// https://github.com/microsoft/vscode-dev-containers/tree/v0.203.0/containers/dotnet
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/dotnet
 {
-	"name": "C# (.NET)",
-	"runArgs": [
-		"--init"
-	],
-	"build": {
-		"dockerfile": "Dockerfile",
-		"args": {
-			// Update 'VARIANT' to pick a .NET Core version: 3.1, 5.0, 6.0
-			// Append -bullseye or -focal to pin to an OS version.
-			"VARIANT": "6.0",
-			// Options
-			"NODE_VERSION": "none"
-		}
-	},
-	// Add the IDs of extensions you want installed when the container is created.
-	"extensions": [
-		"ms-dotnettools.csharp"
-	],
-	"settings": {
-		"omnisharp.enableRoslynAnalyzers": true,
-		"omnisharp.enableEditorConfigSupport": true,
-	},
-	"onCreateCommand": "bash -i ${containerWorkspaceFolder}/.devcontainer/scripts/container-creation.sh",
-	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
-	"remoteUser": "vscode"
-}
+  "name": "C# (.NET)",
+  // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+  "image": "mcr.microsoft.com/devcontainers/dotnet:8.0-bookworm",
+
+  // Features to add to the dev container. More info: https://containers.dev/features.
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {}
+  },
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  //   "forwardPorts": [5000, 5001],
+  //   "portsAttributes": {
+  //  		"5001": {
+  //  			"protocol": "https"
+  //  		}
+  //   }
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "bash -i ${containerWorkspaceFolder}/.devcontainer/scripts/container-creation.sh",
+
+  // Configure tool-specific properties.
+  // "customizations": {},
+
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  // "remoteUser": "root"
+}