Fix the entry point for code-server execution

vscode/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "optuna-dashboard",
-  "version": "0.0.1",
+  "version": "0.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "optuna-dashboard",
-      "version": "0.0.1",
+      "version": "0.1.0",
       "license": "MIT",
       "devDependencies": {
         "@types/mocha": "^10.0.1",

vscode/package.json

@@ -27,7 +27,7 @@
     "optuna-dashboard"
   ],
   "activationEvents": [],
-  "browser": "./dist/web/extension.js",
+  "main": "./dist/web/extension.js",
   "contributes": {
     "commands": [
       {