diff --git a/server/src/main/kotlin/ir/armor/tachidesk/Config.kt b/server/src/main/kotlin/ir/armor/tachidesk/Config.kt
index 82cd347..ce0d1be 100644
--- a/server/src/main/kotlin/ir/armor/tachidesk/Config.kt
+++ b/server/src/main/kotlin/ir/armor/tachidesk/Config.kt
@@ -11,4 +11,5 @@ object Config {
     val extensionsRoot = "$dataRoot/extensions"
     val thumbnailsRoot = "$dataRoot/thumbnails"
     val mangaRoot = "$dataRoot/manga"
+    val serverPort = 4567
 }
diff --git a/webUI/react/src/App.tsx b/webUI/react/src/App.tsx
index b0ac65c..ad00ba5 100644
--- a/webUI/react/src/App.tsx
+++ b/webUI/react/src/App.tsx
@@ -22,10 +22,11 @@ import DarkTheme from './context/DarkTheme';
 import Library from './screens/Library';
 import Settings from './screens/Settings';
 import Categories from './screens/settings/Categories';
+import useLocalStorage from './util/useLocalStorage';
 
 export default function App() {
     const [title, setTitle] = useState<string>('Tachidesk');
-    const [darkTheme, setDarkTheme] = useState<boolean>(true);
+    const [darkTheme, setDarkTheme] = useLocalStorage<boolean>('darkTheme', true);
     const navTitleContext = { title, setTitle };
     const darkThemeContext = { darkTheme, setDarkTheme };
 
diff --git a/webUI/react/src/index.tsx b/webUI/react/src/index.tsx
index 9323515..c10d98b 100644
--- a/webUI/react/src/index.tsx
+++ b/webUI/react/src/index.tsx
@@ -5,7 +5,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import App from './App';
-import reportWebVitals from './reportWebVitals';
 import './index.css';
 // roboto font
 import 'fontsource-roboto';
@@ -16,8 +15,3 @@ ReactDOM.render(
     </React.StrictMode>,
     document.getElementById('root'),
 );
-
-// If you want to start measuring performance in your app, pass a function
-// to log results (for example: reportWebVitals(console.log))
-// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
-reportWebVitals();
diff --git a/webUI/react/src/reportWebVitals.ts b/webUI/react/src/reportWebVitals.ts
deleted file mode 100644
index a7c0b68..0000000
--- a/webUI/react/src/reportWebVitals.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
-import { ReportHandler } from 'web-vitals';
-
-const reportWebVitals = (onPerfEntry?: ReportHandler) => {
-    if (onPerfEntry) {
-        import('web-vitals').then(({
-            getCLS, getFID, getFCP, getLCP, getTTFB,
-        }) => {
-            getCLS(onPerfEntry);
-            getFID(onPerfEntry);
-            getFCP(onPerfEntry);
-            getLCP(onPerfEntry);
-            getTTFB(onPerfEntry);
-        });
-    }
-};
-
-export default reportWebVitals;
diff --git a/webUI/react/src/util/useLocalStorage.tsx b/webUI/react/src/util/useLocalStorage.tsx
new file mode 100644
index 0000000..6e3902f
--- /dev/null
+++ b/webUI/react/src/util/useLocalStorage.tsx
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+import { useState, Dispatch, SetStateAction } from 'react';
+
+// eslint-disable-next-line max-len
+export default function useLocalStorage<T>(key: string, initialValue: T) : [T, Dispatch<SetStateAction<T>>] {
+    // State to store our value
+    // Pass initial state function to useState so logic is only executed once
+    const [storedValue, setStoredValue] = useState<T>(() => {
+        try {
+        // Get from local storage by key
+            const item = window.localStorage.getItem(key);
+
+            // Parse stored json or if null return set and return initialValue
+            if (item !== null) { return JSON.parse(item); }
+
+            window.localStorage.setItem(key, JSON.stringify(initialValue));
+        } finally {
+            // eslint-disable-next-line no-unsafe-finally
+            return initialValue;
+        }
+    });
+
+    // Return a wrapped version of useState's setter function that ...
+    // ... persists the new value to localStorage.
+    const setValue = (value: T | ((prevState: T) => T)) => {
+        try {
+        // Allow value to be a function so we have same API as useState
+            const valueToStore = value instanceof Function ? value(storedValue) : value;
+            // Save state
+            setStoredValue(valueToStore);
+            // Save to local storage
+            window.localStorage.setItem(key, JSON.stringify(valueToStore));
+
+        // eslint-disable-next-line no-empty
+        } catch (error) { }
+    };
+
+    return [storedValue, setValue];
+}