add the code for tutorial

Author: hulyak

package-lock.json

@@ -6,7 +6,9 @@
     "@testing-library/jest-dom": "^5.11.6",
     "@testing-library/react": "^11.1.2",
     "@testing-library/user-event": "^12.2.2",
+    "bootstrap": "^4.5.3",
     "react": "^17.0.1",
+    "react-bootstrap": "^1.4.0",
     "react-dom": "^17.0.1",
     "react-scripts": "4.0.0",
     "web-vitals": "^0.2.4"

package.json

@@ -2,37 +2,7 @@
   text-align: center;
 }
 
-.App-logo {
-  height: 40vmin;
-  pointer-events: none;
-}
-
-@media (prefers-reduced-motion: no-preference) {
-  .App-logo {
-    animation: App-logo-spin infinite 20s linear;
-  }
-}
-
-.App-header {
-  background-color: #282c34;
-  min-height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
+.row {
   justify-content: center;
-  font-size: calc(10px + 2vmin);
-  color: white;
-}
-
-.App-link {
-  color: #61dafb;
-}
-
-@keyframes App-logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
-}
+  margin: 15px 0;
+}