update readme

[skip ci]

Author: rsyring

readme.md

@@ -1,8 +1,34 @@
+# Bubblewrap Binary Releases
+
 Unofficial builds & releases of https://github.com/containers/bubblewrap/
 
 Created to be used with [mise's ubi backend](https://mise.jdx.dev/dev-tools/backends/ubi.html) so
-the latest release of bubblewrap would be available for projects that depend on it.
+the latest release of bubblewrap would be easily available for projects that depend on it.
+
+## Target Platforms
+
+Currently, only Ubuntu latest x64.
+
+PRs welcome that add support for other platforms.
+
+## Usage w/ mise
+
+```toml
+# mise.toml
+[tools]
+"ubi:level12/bwrap" = "latest"
+```
+
+## New Release
+
+When upstream releases, just add a new version tag to this repo to mirror their release.  GitHub
+actions will then build and release.
+
+
+## Local Build
 
-## Ubuntu 24.04 deps needed
+If you want to test the build script locally, see
+[build.yml](https://github.com/level12/bwrap/blob/main/.github/workflows/build.yml) for the apt
+dependencies.
 
-libcap-dev libselinux1-dev
+Then just `./build.sh`.