Increase memory to 4GB (2GB seems to be the default for Node 16)

package.json

@@ -9,7 +9,7 @@
     "e2e-tests"
   ],
   "scripts": {
-    "build": "lerna run build",
+    "build": "cross-env NODE_OPTIONS=--max_old_space_size=4096 lerna run build",
     "clean": "lerna run clean && rimraf node_modules",
     "format": "yarn prettier-eslint --write '**/*.{ts,tsx,js,cjs,mjs,css}' '**/package.json'",
     "postinstall": "theia check:theia-version",