Update README.md and add preview

README.md

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-#
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 <h1 align="center">Psychologist Center</h1>
 
 <p align="center">
   <a href="#-project">Project</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;
   <a href="#-technologies">Tecnologies</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;
   <a href="#%EF%B8%8F-running">Running</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;
-  <!-- <a href="#-testing">Testing</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;   -->
   <a href="#-license">License</a>
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   </a>
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-<!-- <p align="center">
-  <img alt="" src=".github/preview.png" width="100%">
-</p> -->
+<p align="center">
+  <img alt="Psychologist Center" src=".github/preview.svg" width="100%">
+</p>
 
 ## 💻 Project
 
-Psychologist Center is a web system that connects psychologists with their patients.
+Psychologist Center is an EHR (Electronic Health Records) web system, aimed at connecting psychologists with their patients. It simplifies the management of appointments, session notes, and schedules, providing a complete solution for both mental health professionals and their clients. The platform ensures safe and easy access to patient information, helping to improve the therapeutic experience.
 
 ## ✨ Technologies
 
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 4. Server is running on `http://localhost:5173/`
 
-<!-- ## ✔️ Testing
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-Run the command `yarn test` on both `backend/` and `web/` folder to run tests. -->
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 ## 📝 License
 
 This project is under the MIT license. See the [LICENSE](LICENSE.md) file for more details.