docs: ♻️ merge API Reference and Universe menu entries

Signed-off-by: jffarge <jf@dagger.io>

docs/reference/alpine.md

@@ -0,0 +1,23 @@
+---
+sidebar_label: alpine
+---
+
+# alpha.dagger.io/alpine
+
+Base package for Alpine Linux
+
+```cue
+import "alpha.dagger.io/alpine"
+```
+
+## alpine.#Image
+
+Base image for Alpine Linux
+
+### alpine.#Image Inputs
+
+_No input._
+
+### alpine.#Image Outputs
+
+_No output._