diff --git a/README.md b/README.md
index 734cec5..a5ed709 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,21 @@
 The MustardOS Website, please feel free to open a PR for review as this website is open-source.
+
+## Contributing
+
+Small documentation and accuracy fixes are welcome. If you'd like to contribute:
+
+1. Fork the repository and create a branch for your change.
+2. Set up a local preview:
+   - Install Ruby and Bundler if needed.
+   - Run `bundle install`.
+   - Run `bundle exec jekyll serve` to preview the site locally.
+3. Open a pull request.
+
+CI builds the site with `bundle exec jekyll build`, so a local build is a good sanity check before opening a PR.
+
+### Where to look
+
+- `release/` — release pages and metadata
+- `installation/` — installation guide
+- `_data/` — shared site data
+- `_includes/` and `_layouts/` — shared templates