fix(compose): nanoclaude build context를 루트로 변경

Dockerfile이 nanoclaude/와 infra/ 둘 다 COPY하므로
build context가 프로젝트 루트여야 함.

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

docker-compose.yml

@@ -48,7 +48,9 @@ services:
       - gateway-net
 
   nanoclaude:
-    build: ./nanoclaude
+    build:
+      context: .
+      dockerfile: nanoclaude/Dockerfile
     container_name: gpu-nanoclaude
     restart: unless-stopped
     environment: