docs: add list of contributors

.all-contributorsrc

@@ -0,0 +1,33 @@
+{
+  "projectName": "namae",
+  "projectOwner": "uetchy",
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "commitConvention": "angular",
+  "contributors": [
+    {
+      "login": "uetchy",
+      "name": "Yasuaki Uechi",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/431808?v=4",
+      "profile": "https://uechi.io",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "flawyte",
+      "name": "Mickaël Allonneau",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/1585006?v=4",
+      "profile": "https://github.com/flawyte",
+      "contributions": [
+        "code"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7
+}

README.md

@@ -14,3 +14,24 @@ namae saves your time searching around registries and checking if the desired na
 PRs welcome!
 
 See [Contribution Guide](./CONTRIBUTING.md) for the detailed instruction.
+
+### Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://uechi.io"><img src="https://avatars0.githubusercontent.com/u/431808?v=4" width="100px;" alt=""/><br /><sub><b>Yasuaki Uechi</b></sub></a><br /><a href="https://github.com/uetchy/namae/commits?author=uetchy" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/flawyte"><img src="https://avatars3.githubusercontent.com/u/1585006?v=4" width="100px;" alt=""/><br /><sub><b>Mickaël Allonneau</b></sub></a><br /><a href="https://github.com/uetchy/namae/commits?author=flawyte" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-enable -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!