Add custom alt text support to feature image

Author: minimaluminium

partials/feature-image.hbs

@@ -8,10 +8,10 @@
                     {{img_url feature_image size="xxl"}} 2000w"
             sizes="(max-width: 1200px) 100vw, 1120px"
             src="{{img_url feature_image size="xl"}}"
-            alt="{{title}}"
+            alt="{{#if feature_image_alt}}{{feature_image_alt}}{{else}}{{title}}{{/if}}"
         >
         {{#if feature_image_caption}}
             <figcaption>{{feature_image_caption}}</figcaption>
         {{/if}}
     </figure>
-{{/if}}
+{{/if}}