Add web vitals png

content/guides.json

@@ -1,4 +1,13 @@
 [
+  {
+    "id": "what-are-web-vitals",
+    "title": "What are Web Vitals?",
+    "description": "Learn what are the core web vitals and how to measure them.",
+    "isPro": false,
+    "authorUsername": "kamranahmedse",
+    "updatedAt": "2020-09-05T19:59:14.191Z",
+    "createdAt": "2020-09-05T19:59:14.191Z"
+  },
   {
     "id": "ci-cd",
     "title": "What is CI and CD?",

content/guides/what-are-web-vitals.md

@@ -0,0 +1,3 @@
+[![](/guides/web-vitals.png)](/guides/web-vitals.png)
+
+Here is the [original tweet](https://twitter.com/kamranahmedse/status/1425476526770987012) where this image was posted.