Refactor axios code into service.

src/services/NoteService.js

@@ -0,0 +1,16 @@
+import axios from 'axios'
+
+const apiClient = axios.create({
+  baseURL: 'http://localhost:3000',
+  withCredentials: false,
+  headers: {
+    Accept: 'application/json',
+    'Content-Type': 'application/json'
+  }
+})
+
+export default {
+  getNotes() {
+    return apiClient.get('/notes')
+  }
+}

src/store/index.js

@@ -1,5 +1,5 @@
 import { createStore } from 'vuex'
-import axios from 'axios'
+import NoteService from '@/services/NoteService.js'
 
 export default createStore({
   state() {
@@ -9,8 +9,7 @@ export default createStore({
   },
   mutations: {
     FETCH_NOTES(state) {
-      axios
-        .get('http://localhost:3000/notes')
+      NoteService.getNotes()
         .then(response => {
           state.notes = response.data
         })