Add APP_TITLE env variable

.env.sample

@@ -1 +1,2 @@
 DIRECTUS_API_URL=
+APP_TITLE=

app/page.js

@@ -1,10 +1,12 @@
 import {createDirectus, rest, readItems} from '@directus/sdk'
-import {Typography} from '@mui/material'
+import Container from '@mui/material/Container'
+import Typography from '@mui/material/Typography'
 import {formatKonstitisyon} from '../lib/format.js'
 
-async function getData() {
+const apiUrl = process.env.DIRECTUS_API_URL
-  const apiUrl = process.env.DIRECTUS_API_URL
+const appTitle = process.env.APP_TITLE
 
+async function getData() {
   if (!apiUrl) {
     throw new Error('DIRECTUS_API_URL is required')
   }
@@ -41,5 +43,9 @@ export default async function Page() {
 
   console.log('data', data)
 
-  return <Typography variant='h1'>konstitisyon.la</Typography>
+  return (
+    <Container maxWidth='sm'>
+      <Typography component='h1' textAlign='center' variant='h3'>{appTitle.toUpperCase()}</Typography>
+    </Container>
+  )
 }