Use the AppInitAction and the previously stored initial state to bootstrap the app

medium-ngrx-indexeddb-initialState.ts

@Injectable()
export class AccountReducer extends EntityReducer<Account> {
  private initialState: AccountState
  
  createReducer() {
    return (state: AccountState, action: Action) => {
      if (action instanceof AppInitAction && state === undefined) {
        return initialState
      } else {
        ...
      }
    }
  }
 
  bootstrap(): Promise<void> {
  ...
  }
}