Add instructions for all-contributors in README

README.md

@@ -53,6 +53,8 @@ Vidzy is open-source software licensed under the GNU Affero General Public Licen
 
 ## Contributors
 
+We recognize all types of contributions. This project follows the [all-contributors specification](https://github.com/all-contributors/all-contributors) and the [Emoji Key](https://allcontributors.org/docs/en/emoji-key) for contribution types. You can post an issue or comment on a pull request with the text: `@all-contributors please add @YOUR-USERNAME for THINGS` (where `THINGS` is a comma-separated list of entries from the [list of possible contribution types](https://allcontributors.org/docs/en/emoji-key)) and our bot will add you.
+
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->