fix(openGraph) : add description + image

src/assets/logos/logo_1200.svg

+<svg width="1200" height="1200" viewBox="0 0 1200 1200" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect width="1200" height="1200" fill="white"/>
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+</svg>

src/index.html

@@ -5,6 +5,14 @@
     <title>Réseau des Acteurs de la Médiation</title>
     <base href="/" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta property="og:title" content="Réseau des Acteurs de la Médiation" />
+    <meta
+      property="og:description"
+      content="Plateforme à destination des acteurs de l'inclusion numérique de la métropole de Lyon"
+    />
+    <meta property="og:image" content="https://resin.grandlyon.com/assets/logos/logo_1200.svg" />
+    >
+
     <link rel="icon" type="image/x-icon" href="favicon.ico" />
     <link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css" />
     <link