Update readme with images (#2)

* update readme and figure

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README.md

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 # _Mind in Vitro_ Open Hardware
 
 [![Static Badge](https://img.shields.io/badge/webpage-blue)](https://gazzolalab.github.io/MiV-OH/)
+![Static Badge](https://img.shields.io/badge/paper-white)
+[![Static Badge](https://img.shields.io/badge/software-orange)](https://github.com/GazzolaLab/MiV-OS)
 
 ## Description
 
 Introducing _"Mind in Vitro"_ hardware: a cutting-edge, customizable, and portable neural recording and stimulation solution designed for _in vitro_ neural computing.
 The platform supports multimodal interaction and seamless integration of electrical/optical stimulation and fluidic interfaces, while offering cost-effective and open-source accessibility for a wide range of electrophysiology applications.
 
+## Overview of the platform
+
+![image](images/Figure_overview.png)
+
+## How to build your own
+
+The detail description is included in the manuscript.
+All the design files can be downloaded from the [documentation page](https://gazzolalab.github.io/MiV-OH).
+
+### Contributions and participation
+
+Any feedback, bug reports, contributions, and improvements are welcome.
+Feel free to open an issue for any question or suggestion.
+If you would like to post your own design on this repository, please open a pull request.
+
 ## Citation
 
 If you are using these designs, please cite the following paper: