diff --git a/README.md b/README.md
index 00a13b1..65967dd 100644
--- a/README.md
+++ b/README.md
@@ -1,73 +1,33 @@
-<p align="center">
-  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="200" alt="Nest Logo" /></a>
-</p>
+```mermaid
+flowchart TD
+    receiveTracking(["Receive Tracking"])
+    findContainerAndShipment["SELECT container JOIN Shipment"]
+    updateShipment[/Update shipment\]
+    isArrivingSoon{{"Is arrival estimate between now and now + 24h?"}}
+    hasArrived{{"Is arrival estimate <=now?"}}
+    isDelayed{{Is arrival estimate > original arrival + 24h?}}
+    sendNotification[/Send notification\]
 
-[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
-[circleci-url]: https://circleci.com/gh/nestjs/nest
-
-  <p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
-    <p align="center">
-<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
-<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
-<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
-<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
-<a href="https://coveralls.io/github/nestjs/nest?branch=master" target="_blank"><img src="https://coveralls.io/repos/github/nestjs/nest/badge.svg?branch=master#9" alt="Coverage" /></a>
-<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
-<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
-<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
-  <a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg"/></a>
-    <a href="https://opencollective.com/nest#sponsor"  target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
-  <a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow"></a>
-</p>
-  <!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
-  [![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
-
-## Description
-
-[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
-
-## Installation
-
-```bash
-$ npm install
+    
+    receiveTracking -- "`
+    **Tracking data**
+carrierName:**string**
+destinationUnLoCode:**string**
+departureDate:**string[_datetime_]**
+arrivalDateEstimate:**string[_datetime_]**
+containerNumber:**string**
+`" -->  findContainerAndShipment
+    findContainerAndShipment --> |WHERE containers.containerNumber = :trackingData.containerNumber| updateShipment
+    updateShipment --> isArrivingSoon & hasArrived & isDelayed
+    isDelayed -->|set delayed flag| sendNotification
+    hasArrived  --> |set has arrived flag| sendNotification
+    isArrivingSoon -->|set is arriving soon flag| sendNotification
+    
+%%    isArrivingSoon -->|yes| sendArriveSoon
 ```
 
-## Running the app
-
-```bash
-# development
-$ npm run start
-
-# watch mode
-$ npm run start:dev
-
-# production mode
-$ npm run start:prod
+```mermaid
+flowchart
+    getShipments([Get all shipments])
+    
 ```
-
-## Test
-
-```bash
-# unit tests
-$ npm run test
-
-# e2e tests
-$ npm run test:e2e
-
-# test coverage
-$ npm run test:cov
-```
-
-## Support
-
-Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
-
-## Stay in touch
-
-- Author - [Kamil Myśliwiec](https://kamilmysliwiec.com)
-- Website - [https://nestjs.com](https://nestjs.com/)
-- Twitter - [@nestframework](https://twitter.com/nestframework)
-
-## License
-
-Nest is [MIT licensed](LICENSE).