Sort imports from all files

Add "prettier" script in `package.json` to check if all files are
compliant.

Sort all imports and format all files by running `npm run lint -- --fix`
followed by `npm run prettier -- --write`.

Gitlab #29

Change-Id: Id80402d1344c3bc611f66a46cffeee5f2c375bd8
diff --git a/client/src/pages/serverSetup.jsx b/client/src/pages/serverSetup.jsx
index cf9b3eb..95fc032 100644
--- a/client/src/pages/serverSetup.jsx
+++ b/client/src/pages/serverSetup.jsx
@@ -1,7 +1,7 @@
+import GroupAddRounded from '@mui/icons-material/GroupAddRounded';
+import { Box, Card, CardContent, Container, Fab, Input, Typography } from '@mui/material';
 import { useState } from 'react';
 
-import { Box, Container, Fab, Card, CardContent, Typography, Input } from '@mui/material';
-import GroupAddRounded from '@mui/icons-material/GroupAddRounded';
 import authManager from '../AuthManager';
 
 export default function ServerSetup(props) {