diff --git a/README.md b/README.md
index 45f2e53..ee234e3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,17 @@
 # halfPage
 
-Startpage w/ halfmoon & preact
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+Startpage w/ halfmoon & preact
+
+# building
+
+Install deps: [bun](https://bun.sh/) i
+
+run build script: [bun](https://bun.sh/) run build
+
+## building ext
+
+Build like normal first
+
+Copy the `dist` folder over to the `ext` folder
+
+edit `ext/dist/index.html` to remove any prepending slashses (/) from link and script tags.
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