chore: Avoid hard codeing /.well-known/ic-domains (#3638)

# Motivation

The domains specified in /.well-known/ic-domains of the II canisters
should not be hard coded but should instead depend on the canister
config.

# Changes

Set /.well-known/ic-domains to all the domains from `related_origins`.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: aterga

src/internet_identity/src/assets.rs

@@ -93,7 +93,15 @@ pub fn get_static_assets(config: &InternetIdentityInit) -> Vec<Asset> {
     // See https://internetcomputer.org/docs/current/developer-docs/production/custom-domain/#custom-domains-on-the-boundary-nodes
     assets.push(Asset {
         url_path: "/.well-known/ic-domains".to_string(),
-        content: b"identity.internetcomputer.org\nbeta.identity.ic0.app\nbeta.identity.internetcomputer.org\nid.ai\nbeta.id.ai\nwww.id.ai".to_vec(),
+        content: config
+            .related_origins
+            .clone()
+            .unwrap_or_default()
+            .into_iter()
+            .map(|origin| origin.replace("https://", ""))
+            .collect::<Vec<_>>()
+            .join("\n")
+            .into_bytes(),
         encoding: ContentEncoding::Identity,
         content_type: ContentType::OCTETSTREAM,
     });

src/internet_identity_frontend/src/main.rs

@@ -322,10 +322,17 @@ fn get_static_assets(config: &InternetIdentityFrontendArgs) -> Vec<AssetUtilAsse
     });
 
     // Add .well-known/ic-domains for custom domain support
-    let ic_domains_content = b"identity.internetcomputer.org\nbeta.identity.ic0.app\nbeta.identity.internetcomputer.org\nid.ai\nbeta.id.ai\nwww.id.ai".to_vec();
     assets.push(AssetUtilAsset {
         url_path: "/.well-known/ic-domains".to_string(),
-        content: ic_domains_content,
+        content: config
+            .related_origins
+            .clone()
+            .unwrap_or_default()
+            .into_iter()
+            .map(|origin| origin.replace("https://", ""))
+            .collect::<Vec<_>>()
+            .join("\n")
+            .into_bytes(),
         encoding: ContentEncoding::Identity,
         content_type: ContentType::OCTETSTREAM,
     });