docs: add more configs to registry guide

docs/src/content/docs/guides/self-hosting-registries.mdx

@@ -100,6 +100,20 @@ The access token must have read and write access to the index repository.
 - **GITHUB_PAT**: The personal access token of the GitHub account specified by
   `GITHUB_USERNAME`. This is required.
 
+- **COMMITTER_GIT_NAME**: The name to use for the committer when updating the
+  index repository.\
+  Example: `pesde index updater`
+
+- **COMMITTER_GIT_EMAIL**: The email to use for the committer when updating the
+  index repository.\
+  Example: `pesde@localhost`
+
+- **ADDRESS**: The address to bind the server to.\
+  Default: `127.0.0.1`
+
+- **PORT**: The port to bind the server to.\
+  Default: `8080`
+
 ### Authentication configuration
 
 The registry supports multiple authentication methods, which are documented