chore: manage bun.lockb in Docker and project configuration

- Update .dockerignore to exclude bun.lockb
- Modify .gitignore to track bun.lockb
- Update Dockerfile to remove bun.lockb copy step
- Add bun.lockb binary lockfile to the repository

.gitignore

@@ -65,7 +65,6 @@ home-assistant_v2.db-*
 package-lock.json
 yarn.lock
 pnpm-lock.yaml
-bun.lockb
 
 coverage/*
 coverage/
@@ -79,3 +78,4 @@ coverage/
 
 .bun/
 .cursorconfig
+bun.lockb