Update devcontainer to Ubuntu 22.04 (#253)

Author: TiejunZhou-CN

.devcontainer/devcontainer.json

@@ -1,4 +1,13 @@
 {
-    "image": "tizho/azurertos-regression",
+    "image": "ghcr.io/tiejunms/azure_rtos_docker",
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"ms-vscode.cpptools",
+		"ms-vscode.cmake-tools"
+	],
+
+	"remoteUser": "vscode",
+
     "runArgs": [ "--cap-add=NET_ADMIN"]
 }