add branch prereleases (#115)

Author: dario-piotrowicz

.github/workflows/prereleases.yml

@@ -1,6 +1,10 @@
 name: Publish prereleases
 
-on: pull_request
+on:
+  push:
+    branches: [main, experimental]
+  pull_request:
+    branches: [main, experimental]
 
 jobs:
   release:

README.md

@@ -17,6 +17,25 @@ The repository contains two directories:
 - `packages` containing a cloudflare package that can be used to build a Cloudflare Workers-compatible output for Next.js applications.
 - `examples` containing Next.js applications that use the above mentioned cloudflare package.
 
-### How to try out/develop in the repository
+### How to try out the `@opennextjs/cloudflare` package
+
+You can simply install the package from npm as specified in the [OpenNext documentation](https://opennext.js.org/cloudflare/get-started).
+
+#### Preleases
+
+Besides the standard npm releases we also automatically publish prerelease packages on branch pushes (using [`pkg.pr.new`](https://github.com/stackblitz-labs/pkg.pr.new)):
+
+- `https://pkg.pr.new/@opennextjs/cloudflare@main`:
+  Updated with every push to the `main` branch, this prerelease contains the most up to date yet (reasonably) stable version of the package.
+- `https://pkg.pr.new/@opennextjs/cloudflare@experimental`
+  Updated with every push to the `experimental` branch, this prerelease contains the latest experimental version of the package (containing features that we want to test/experiment on before committing to).
+
+Which you can simply install directly with your package manager of choice, for example:
+
+```bash
+npm i https://pkg.pr.new/@opennextjs/cloudflare@main
+```
+
+### How to develop in the repository
 
 See the [CONTRIBUTING](./CONTRIBUTING.md) page for how to get started with this repository.