message: Add initial docs for prereleases
diff: @@ -29,3 +29,18 @@ To install the most recent version from a release channel in your project, run:
  ```sh
  yarn add @sumup/circuit-ui@<release-channel>
  ```
  +
  +### Prereleases
  +
  +Prereleases can be done for either the `next` or the `canary` release channels.
  +
  +To publish a prerelease version, check out on the branch for your release channel and run the changesets `pre enter` command:
  +
  +```bash
  +git checkout next # or `canary`
  +yarn changeset pre enter next # or `canary`
  +```
  +
  +This will generate a `pre.json` file in the `.changeset` directory.
  +
  +Push it to the branch, then verify and merge the changesets `Version Packages` PR for your release channel. Changesets will publish the prerelease version in the CI.
  