Default to a non-root user

.devcontainer/devcontainer.json

@@ -1,12 +1,15 @@
 {
-    "name": "Node.js Sample",
-    "dockerFile": "Dockerfile",
-    "appPort": 3000,
-    "extensions": [
-        "dbaeumer.vscode-eslint"
-    ],
-    "settings": {
-        "terminal.integrated.shell.linux": "/bin/bash"
-    },
-    "postCreateCommand": "yarn install"
+	"name": "Node.js Sample",
+	"dockerFile": "Dockerfile",
+	"appPort": 3000,
+	"extensions": [
+		"dbaeumer.vscode-eslint"
+	],
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash"
+	},
+	"postCreateCommand": "yarn install",
+	// Comment out the next line to run as root instead. Linux users, update the next line and 
+	// Dockerfile with your user's UID/GID if not 1000.
+	"runArgs": [ "-u", "1000" ]
 }