Ozone: add metadata endpoint (#3735)

* ozone: add well-known metadata endpoint

* ozone changeset

.changeset/tall-rice-sparkle.md

@@ -0,0 +1,5 @@
+---
+"@atproto/ozone": patch
+---
+
+Added well-known metadata endpoint to ozone.

.github/workflows/build-and-push-ozone-aws.yaml

@@ -3,7 +3,7 @@ on:
   push:
     branches:
       - main
-      - divy/ozone-passthru
+      - divy/ozone-metadata
 env:
   REGISTRY: ${{ secrets.AWS_ECR_REGISTRY_USEAST2_PACKAGES_REGISTRY }}
   USERNAME: ${{ secrets.AWS_ECR_REGISTRY_USEAST2_PACKAGES_USERNAME }}

packages/ozone/src/api/well-known.ts

@@ -31,5 +31,13 @@ export const createRouter = (ctx: AppContext): Router => {
     })
   })
 
+  router.get('/.well-known/ozone-metadata.json', (_req, res) => {
+    return res.json({
+      did: ctx.cfg.service.did,
+      url: ctx.cfg.service.publicUrl,
+      publicKey: ctx.signingKey.did(),
+    })
+  })
+
   return router
 }