feat: Initial setup of theme.

src/redux/index.js

@@ -0,0 +1,17 @@
+import { combineReducers } from 'redux';
+import { authReducer } from './AuthRedux';
+
+// Combine all reducers.
+const appReducer = combineReducers({
+  auth: authReducer
+});
+
+const rootReducer = (state, action) => {
+  // Clear all data in redux store to initial.
+  if (action.type === 'LOGOUT') {
+    state = undefined;
+  }
+
+  return appReducer(state, action);
+};
+export default rootReducer;