Added basic check for #39

frontend/package.json

@@ -4,9 +4,9 @@
   "version": "0.3.0",
   "private": true,
   "dependencies": {
-    "@material-ui/core": "^3.9.3",
+    "@material-ui/core": "^4.5.2",
     "@material-ui/icons": "^4.5.1",
-    "@material-ui/styles": "^4.5.0",
+    "@material-ui/styles": "^4.5.2",
     "@use-it/interval": "^0.1.3",
     "class-transformer": "^0.2.0",
     "create-react-app": "^2.0.3",
@@ -32,6 +32,7 @@
     "react": "^16.10.2",
     "react-alert": "^5.5.0",
     "react-alert-template-basic": "^1.0.0",
+    "react-beforeunload": "^2.2.1",
     "react-chartjs-2": "^2.8.0",
     "react-cookie": "^4.0.1",
     "react-cytoscapejs": "^1.2.0",