refactor: move apiService to utilities

src/.vuepress/components/SearchPage.vue

@@ -14,7 +14,7 @@
 <script>
 import SearchResultList from "./SearchResultList";
 import SearchResultEmpty from "./SearchResultEmpty";
-import apiService from '../api/api';
+import apiService from '../utilities/api';
 
 export default {
   components: {

src/.vuepress/utilities/api.js

+import axios from 'axios';
+
+class ApiService {
+  constructor(baseURL) {
+    this.http = axios.create({
+      baseURL: baseURL,
+      timeout: 5000,
+    });
+    this.http.interceptors.response.use(
+      (response) => response.data,
+      (error) => {
+        return Promise.reject(error);
+      },
+    );
+  }
+
+  async search(value, from, size) {
+    return this.request('/search', 'POST', {
+      query: {
+        simple_query_string: {
+          query: value
+        }
+      },
+      from,
+      size
+    })
+  }
+
+  async request (url, method, data, params) {
+    return await this.http.request({
+      url,
+      method,
+      data,
+      params,
+    });
+  }
+}
+
+export default new ApiService(process.env.VUE_APP_BASE_URL_API);