feat: extract hardcoded branding values to env vars

app/paroles/page.js

@@ -8,6 +8,8 @@ import Footer from '../../components/footer'
 
 const apiUrl = process.env.NEXT_PUBLIC_API_URL_ROOT || 'http://localhost:1337'
 const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000'
+const siteName = process.env.NEXT_PUBLIC_SITE_NAME || 'PAWÒL-NU. Paroles et traductions.'
+const twitterHandle = `@${process.env.NEXT_PUBLIC_TWITTER_USERNAME || 'OrganisationKA'}`
 
 async function jwennDone() {
   const denyeTeks = await jwennDenyeTeks()
@@ -29,23 +31,23 @@ export async function generateMetadata() {
   const description = `Derniers morceaux : ${songList}…`
 
   return {
-    title: 'PAWÒL-NU | Derniers morceaux',
+    title: `${siteName} | Derniers morceaux`,
     description,
     openGraph: {
-      title: 'PAWÒL-NU | Derniers morceaux',
+      title: `${siteName} | Derniers morceaux`,
       description,
       url: `${siteUrl}/paroles`,
-      siteName: 'PAWÒL-NU. Paroles et traductions.',
+      siteName,
       images: [{url: imageUrl, width: imageWidth, height: imageHeight}],
       locale: 'fr_FR',
       type: 'website',
     },
     twitter: {
-      site: '@OrganisationKA',
+      site: twitterHandle,
       card: 'summary_large_image',
-      title: 'PAWÒL-NU | Derniers morceaux',
+      title: `${siteName} | Derniers morceaux`,
       description,
-      creator: '@OrganisationKA',
+      creator: twitterHandle,
       images: {url: imageUrl, alt: 'Couverture du dernier morceau publié'},
     },
   }