Second commit

added few test, first api to add book

front/src/api.js

@@ -0,0 +1,29 @@
+import { ref } from 'vue'
+
+const baseUrl = "http://localhost:8080"
+
+function useFetch(url) {
+  const data = ref(null)
+  const error = ref(null)
+
+  fetch(url)
+    .then((res) => res.json())
+    .then((json) => (data.value = json))
+    .catch((err) => (error.value = err))
+
+  return { data, error }
+}
+
+export function getBooks() {
+  return useFetch(baseUrl + '/books');
+}
+
+export function postBook(book) {
+  fetch(baseUrl + '/book', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json'
+    },
+    body: JSON.stringify(book.value)
+  });
+}