Move src to dashboard (#152)

app/javascript/dashboard/api/billing.js

@@ -0,0 +1,20 @@
+/* global axios */
+
+import endPoints from './endPoints';
+
+export default {
+  getSubscription() {
+    const urlData = endPoints('subscriptions').get();
+    const fetchPromise = new Promise((resolve, reject) => {
+      axios
+        .get(urlData.url)
+        .then(response => {
+          resolve(response);
+        })
+        .catch(error => {
+          reject(error);
+        });
+    });
+    return fetchPromise;
+  },
+};