Warn about status of Homebrew support

Author: mraerino

included_software.md

@@ -73,7 +73,9 @@ The specific patch versions included will depend on when the image was last buil
 * [WASMER](https://github.com/wasmerio/wasmer)
 * [WAPM](https://github.com/wasmerio/wapm-cli)
 
-* [Homebrew](https://brew.sh/)
+* [Homebrew](https://brew.sh/) - **EARLY ALPHA**
+  - this is not production ready
+  - it might be removed or changed significantly
   - Any linux formula is supported: https://formulae.brew.sh/formula-linux/
   - Formulae from a `Brewfile` are installed automatically via [`brew bundle`](https://github.com/Homebrew/homebrew-bundle#readme)
   - `HOMEBREW_BUNDLE_FILE` is respected