Add contributors

.all-contributorsrc

@@ -0,0 +1,7 @@
+{
+  "projectName": "chatgpt-web",
+  "projectOwner": "Niek",
+  "repoType": "github",
+  "commit": false,
+  "contributors": []
+}

README.md

@@ -4,6 +4,8 @@
 
 ![Screenshot of ChatGPT-web](.github/screenshot.png)
 
+[![All Contributors](https://img.shields.io/github/all-contributors/Niek/chatgpt-web?color=ee8449&style=flat-square)](#contributors)
+
 ChatGPT-web is a simple one-page web interface to the OpenAI ChatGPT API. To use it, you need to register for [an OpenAI API key](https://platform.openai.com/account/api-keys) first. All messages are stored in your browser's local storage, so everything is **private**. You can also close the browser tab and come back later to continue the conversation.
 
 ## Why?
@@ -18,3 +20,14 @@ To run the development server, run
 npm ci
 npm run dev # or: npm run build
 ```
+
+## Contributors
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->