fix(docker): fix mana-credits Dockerfile to resolve workspace deps

The Dockerfile copied only its own package.json, causing bun install to
fail on @mana/shared-hono workspace dependency. Now copies workspace root
package.json and shared-hono/shared-types packages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.macmini.yml

@@ -296,8 +296,8 @@ services:
 
   mana-credits:
     build:
-      context: services/mana-credits
-      dockerfile: Dockerfile
+      context: .
+      dockerfile: services/mana-credits/Dockerfile
     image: mana-credits:local
     container_name: mana-credits
     restart: always