add

.vscode/launch.json

@@ -0,0 +1,29 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "args": [
+                "--extensionDevelopmentPath=${workspaceFolder}"
+            ],
+            "name": "Launch Extension",
+            "outFiles": [
+                "${workspaceFolder}/out/**/*.js"
+            ],
+            "preLaunchTask": "npm",
+            "request": "launch",
+            "type": "extensionHost"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${file}"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "liveServer.settings.port": 5501
+}