refactor(starter): upgrade and move to typescript

src/components/Post/Content/Content.test.tsx

@@ -2,10 +2,15 @@ import React from "react";
 import renderer from "react-test-renderer";
 
 import { Content } from "@/components/Post/Content";
+import * as mocks from "@/mocks";
 
 describe("Content", () => {
   it("renders correctly", () => {
-    const props = { title: "test", body: "<p>test</p>" };
+    const props = {
+      title: mocks.markdownRemark.frontmatter.title,
+      body: mocks.markdownRemark.html,
+    };
+
     const tree = renderer.create(<Content {...props} />).toJSON();
     expect(tree).toMatchSnapshot();
   });