Add default share image to Metas

src/components/Metas.svelte

@@ -1,7 +1,12 @@
 <script lang="ts">
+    import { getContext } from 'svelte'
+    import { getAssetUrlKey } from '$utils/api'
+
+    const { settings }: any = getContext('global')
+
     export let title: string
     export let description: string = undefined
-    export let image: string = undefined
+    export let image: string = getAssetUrlKey(settings.seo_image.id, 'share-image')
     export let url: string = undefined
     export let type: string = 'website'
     export let card: string = 'summary_large_image'