refactor: migrate to vite

frontend/src/components/Bar/Bar.jsx

@@ -90,7 +90,7 @@ function Bar() {
             >
               {menuItems.map((menuItem, index) => {
                 if (
-                  menuItem.hasOwnProperty("condition") &&
+                  Object.prototype.hasOwnProperty.call(menuItem, "condition") &&
                   !menuItem.condition
                 ) {
                   return null;

frontend/src/components/LogIn/LogIn.jsx

@@ -6,7 +6,7 @@ import LogInToken from "./components/LogInToken";
 function LogIn() {
   return (
     <>
-      {process.env.NODE_ENV === "development" && (
+      {import.meta.env.DEV && (
         <>
           <LogInToken />
           <Divider orientation="vertical" />

frontend/src/components/NetworkRules/NetworkRules.jsx

@@ -124,7 +124,7 @@ function NetworkRules({ network, callback }) {
             width: "250px",
           }}
         >
-          {!!errors.length ? (
+          {errors.length ? (
             <Typography color="error">
               {"[" + errors[0] + ":" + errors[1] + "] " + errors[2]}
             </Typography>