diff --git a/frontend/Caddyfile b/frontend/Caddyfile
new file mode 100644
index 0000000..e6fc804
--- /dev/null
+++ b/frontend/Caddyfile
@@ -0,0 +1,12 @@
+:80 {
+	root * /srv
+	file_server
+	encode gzip
+
+	# 정적 에셋 캐싱 (해시된 파일명)
+	@immutable path /_app/immutable/*
+	header @immutable Cache-Control "public, max-age=31536000, immutable"
+
+	# SPA fallback
+	try_files {path} /index.html
+}
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 3a33433..e4646b1 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -12,12 +12,12 @@ COPY . .
 RUN npm run build
 
 # ── 실행 스테이지 ──────────────────────────────────────────
-FROM nginx:alpine
+FROM caddy:alpine
 
-# nginx 설정 복사
-COPY nginx.conf /etc/nginx/conf.d/default.conf
+# Caddyfile 복사
+COPY Caddyfile /etc/caddy/Caddyfile
 
 # 빌드 결과물 복사
-COPY --from=builder /app/build /usr/share/nginx/html
+COPY --from=builder /app/build /srv
 
 EXPOSE 80
diff --git a/frontend/nginx.conf b/frontend/nginx.conf
deleted file mode 100644
index c7c2011..0000000
--- a/frontend/nginx.conf
+++ /dev/null
@@ -1,42 +0,0 @@
-server {
-    listen 80;
-    server_name _;
-    root /usr/share/nginx/html;
-    index index.html;
-
-    # SPA fallback: 파일이 없으면 index.html로
-    location / {
-        try_files $uri $uri/ /index.html;
-    }
-
-    # 정적 에셋 캐싱 (해시된 파일명)
-    location /_app/immutable/ {
-        expires 1y;
-        add_header Cache-Control "public, immutable";
-    }
-
-    # API/WS는 백엔드로 프록시 (docker-compose에서 설정)
-    location /api/ {
-        proxy_pass http://backend:8080;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-    }
-
-    location /ws {
-        proxy_pass http://backend:8080;
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection "upgrade";
-        proxy_set_header Host $host;
-    }
-
-    location /login {
-        proxy_pass http://backend:8080;
-        proxy_set_header Host $host;
-    }
-
-    location /logout {
-        proxy_pass http://backend:8080;
-        proxy_set_header Host $host;
-    }
-}