Hook up language service to editor

browser-playground/package.json

@@ -11,9 +11,11 @@
     "monaco-languageclient": "^4.0.3",
     "path-browserify": "^1.0.1",
     "vscode-languageserver": "^8.0.2",
-    "vscode-languageserver-protocol": "^3.17.2"
+    "vscode-languageserver-protocol": "^3.17.2",
+    "@github/actions-languageserver": "*"
   },
   "scripts": {
+    "build": "webpack --mode production",
     "clean": "rimraf dist",
     "start": "webpack-dev-server --mode development --open",
     "test": "echo \"Error: no test specified\" && exit 1",
@@ -25,6 +27,7 @@
     "rimraf": "^3.0.2",
     "style-loader": "^3.3.1",
     "ts-loader": "^9.4.2",
+    "typescript": "^4.9.4",
     "webpack": "^5.75.0",
     "webpack-cli": "^5.0.1",
     "webpack-dev-server": "^4.11.1"