Update bzlmod instructions for --registry=my-fork
Point out how to point --registry to a GitHub repository
Closes #14408.
PiperOrigin-RevId: 416051009
diff --git a/site/docs/bzlmod.md b/site/docs/bzlmod.md
index 7394854..61d38f9 100644
--- a/site/docs/bzlmod.md
+++ b/site/docs/bzlmod.md
@@ -278,6 +278,13 @@
precedence. For convenience, you can put a list of `--registry` flags in the
.bazelrc file of your project.
+Note that if your registry is hosted on GitHub (as a fork of
+bazelbuild/bazel-central-registry for example) then you'll need your
+`--registry` value to have a raw GitHub address under
+`raw.githubusercontent.com`. For example on the `main` branch of the `my-org`
+fork, you would set
+`--registry=https://raw.githubusercontent.com/my-org/bazel-central-registry/main/`.
+
## Module Extensions
Module extensions allow you to extend the module system by reading input data
