Resolve "ci: build fail"

Closes #13 (closed)

src/pages/dummy_page.js

-import React from "react";
-import Layout from "@theme/Layout";
-
-function Dummy() {
-  return (
-    <Layout title="Dummy Page">
-      <div
-        style={{
-          display: "flex",
-          justifyContent: "center",
-          alignItems: "center",
-          height: "50vh",
-          fontSize: "20px",
-        }}>
-        <p>
-          Page factice penser à créer une vrais page !
-        </p>
-      </div>
-    </Layout>
-  );
-}
-
-export default Dummy;