diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index cb5fad1..ee56468 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -92,6 +92,6 @@ jobs:
             docker compose pull
             docker compose up -d
             docker exec guideon-nginx nginx -s reload
-            docker image prune -af --filter "until=168h"
+            docker image prune -af
             echo "=== Deploy complete ==="
             docker compose ps
diff --git a/infra/Dockerfile b/infra/Dockerfile
index d5ebcf0..b8f3649 100644
--- a/infra/Dockerfile
+++ b/infra/Dockerfile
@@ -1,18 +1,8 @@
 FROM postgis/postgis:16-3.4
 
-RUN apt-get update && apt-get install -y \
-    git \
-    make \
-    build-essential \
-    postgresql-server-dev-16 \
-    clang-13 \
-    llvm-13 \
+# pgvector: 빌드 도구 없이 PGDG apt 패키지로 설치 (이미지 크기 ~2GB 절감)
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends postgresql-16-pgvector \
     && rm -rf /var/lib/apt/lists/*
 
-RUN cd /tmp && \
-    git clone --branch v0.7.0 https://github.com/pgvector/pgvector.git && \
-    cd pgvector && \
-    make && \
-    make install
-
 COPY init.sql /docker-entrypoint-initdb.d/20_init.sql
\ No newline at end of file