add contributor graph (#281) [no ci]

* fix(readme): move ac badge
* fix(readme): add contributor graph [no ci]

README.md

@@ -1,7 +1,4 @@
 # DNA Diffusion
-<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
-<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 <img src='https://raw.githubusercontent.com/pinellolab/DNA-Diffusion/main/docs/images/diff_first_lossy.gif?inline=true'> </img>
 
@@ -13,6 +10,10 @@
 [![codecov](https://codecov.io/gh/pinellolab/DNA-Diffusion/branch/main/graph/badge.svg)](https://codecov.io/gh/pinellolab/DNA-Diffusion)
 [![PyPI version](https://badge.fury.io/py/dnadiffusion.svg?kill_cache=1)](https://badge.fury.io/py/dnadiffusion)
 
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
+
 ---
 
 **Documentation**: <a href="https://pinellolab.github.io/DNA-Diffusion" target="_blank">https://pinellolab.github.io/DNA-Diffusion</a>
@@ -250,4 +251,8 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
+<a href="https://github.com/pinellolab/DNA-Diffusion/graphs/contributors">
+  <img src="https://contributors-img.web.app/image?repo=pinellolab/DNA-Diffusion" />
+</a>
+
 This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!