diff --git a/README.md b/README.md
index e2d6461..7ab1978 100644
--- a/README.md
+++ b/README.md
@@ -11,31 +11,41 @@ docker run -d \
 -v path:/etc/nginx/nginx.conf:ro \
 -v path:/etc/nginx/sites-enabled \
 -v path:/var/www \
+-e CLOUDFLARE_EMAIL="youremail" \
+-e CLOUDFLARE_API_KEY="yourkey" \
+-e DOMAIN="your.domain.com,*.domain.com"
 --net host \
 --name nginx \
 --restart=always \
 nginx-certbot
 ```
 
-## 인증서 발급
+## docker compose
+```yml
+services:
+  nginx:
+    build: .
+    environment:
+      DOMAIN: "domain.com,*.domain.com"     # 등록할 도메인 주소
+      CLOUDFLARE_EMAIL: "your@email.com"    # 클라우드플레어 이메일주소
+      CLOUDFLARE_API_KEY: "your-key"        # 클라우드플레어 api 키
+    volumes:
+      - path:/etc/letsencrypt/              # certbot 이 생성한 키 보관위치
+      - path:/etc/nginx/conf.d              # nginx conf.d 폴더
+      - path/nginx.conf:/etc/nginx/nginx.conf:ro # nginx.confg
+      - path:/etc/nginx/sites-enabled       # nginx sites-enalbe 폴더
+      - path:path:/var/www                  # 기본 www 폴더
+    network_mode: host                      # 용도에 맞게 변환
+```
+
+## create certificate
 ```sh
+# enter nginx bash shell
 docker exec -it nginx bash
 
-# create cloudflare ini
-echo dns_cloudflare_email=your@email.address > /etc/letsencrypt/cloudflare.ini
-echo dns_cloudflare_api_key=your@key >> /etc/letsencrypt/cloudflare.ini
-
-# set 600 permission
-chmod 600 /etc/letsencrypt/cloudflare.ini
-
-# create ssl certifications
-certbot certonly \
---dns-cloudflare \
---dns-cloudflare-credentials /etc/letsencrypt/cloudflare.ini \
---email your@email.address\
---agree-tos \
---no-eff-email \
--d your.domain,*.your.domain
+# excute shell script
+./ create-cert-cloudflare.sh
 
+# reload nginx
 nginx -s reload
 ```
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