add store singleton

web/app/common/store.js

@@ -0,0 +1,26 @@
+let _instance;
+
+class Store {
+  constructor() {
+    if (_instance) return _instance;
+
+    this.data = {};
+
+    _instance = this;
+
+    return _instance;
+  }
+
+  set(obj) {
+    this.data = {
+      ...this.data,
+      ...obj,
+    };
+  }
+
+  get(key) {
+    return this.data[key];
+  }
+}
+
+export default new Store();