feat: add card image upload to link content types

.forestry/front_matter/templates/newslinks.yml

@@ -21,6 +21,9 @@ fields:
   - type: text
     name: path
     label: path
+  - type: file
+    name: card_image
+    label: card_image
   - type: datetime
     name: date
     label: date

src/.vuepress/theme/components/blog/LinkCard.vue

@@ -19,11 +19,14 @@
             img-class="h-full"
             itemprop="image"
             :alt="title"
-            :src="`${
-              frontmatter.header_image
-                ? frontmatter.header_image
-                : '/header-image-placeholder.png'
-            }`"
+            :src="
+              frontmatter.card_image
+                ? frontmatter.card_image
+                : `/${frontmatter.type
+                    .toLowerCase()
+                    .split(' ')
+                    .join('-')}-placeholder.png`
+            "
           />
         </UnstyledLink>
       </div>