Limit blog posts on index page and key list fix

src/pages/index.js

@@ -149,9 +149,8 @@ const IndexPage = ({ ...props }) => (
       />
       <div className="lg:flex justify-center mt-8">
         {props.data.allWordpressPost.edges.map(({ node }) => (
-          <div className="md:w-1/2 p-2">
+          <div key={node.id} className="md:w-1/2 p-2">
             <Card
-              key={node.id}
               url={`blog/${node.slug}`}
               title={node.title}
               date={node.date}
@@ -177,7 +176,7 @@ const IndexPage = ({ ...props }) => (
 
 export const query = graphql`
   query indexPostsQuery {
-    allWordpressPost {
+    allWordpressPost(limit: 2) {
       edges {
         node {
           id