Add integration pages for Abstract integration

server/pages/integrations/abstract.md

@@ -0,0 +1,7 @@
+In an Outline document, paste a _public_ share link to an [Abstract](https://abstract.com) artboard and it will be immediately converted into an interactive, live embed.
+
+Embedding an artboard from Abstract in your knowledge base rather than a static image will enable it to stay upto date with your work in Abstract. Find out more about [Abstract public sharing](https://www.abstract.com/blog/public-sharing/).
+
+![Abstract Outline Integration](/images/screenshots/abstract.png)
+
+> This integration works without any additional settings or authentication.

server/pages/integrations/content.json

@@ -1,4 +1,11 @@
 [
+  {
+    "slug": "abstract",
+    "name": "Abstract",
+    "url": "https://abstract.com",
+    "category": "Design",
+    "description": "One place to version, manage, and collaborate"
+  },
   {
     "slug": "figma",
     "name": "Figma",