diff --git a/gitlab/README.md b/gitlab/README.md
index 4edc807..28957d6 100644
--- a/gitlab/README.md
+++ b/gitlab/README.md
@@ -1,15 +1,27 @@
 gitlab
 ======
 
+[GitLab][1] includes Git repository management, code reviews, issue tracking,
+wikis, and more, plus GitLab CI, an easy-to-use continuous integration and
+deployment tool.
+
 ## docker-compose.yml
 
 ```
 gitlab:
   image: gitlab/gitlab-ce
+  hostname: gitlab.example.com
+  environment:
+    GITLAB_OMNIBUS_CONFIG: |
+      external_url 'https://gitlab.example.com'
   ports:
     - "22:22"
     - "80:80"
     - "443:443"
+  volumes:
+    - ./gitlab/config:/etc/gitlab
+    - ./gitlab/logs:/var/log/gitlab
+    - ./gitlab/data:/var/opt/gitlab
   restart: always
 ```
 
@@ -19,16 +31,12 @@ gitlab:
 $ vi /etc/ssh/sshd_config
 - Port 22
 + Port 2222
+
 $ systemctl restart ssh
 
 $ docker-compose up -d
-$ docker-compose exec gitlab bash
->>> vi /etc/gitlab/gitlab.rb
-+   external_url 'http://your-domain-name'
->>> gitlab-ctl reconfigure
->>> exit
 
-$ firefox http://your-domain-name
+$ firefox https://gitlab.example.com
 ```
 
 ## backup volumes
@@ -42,3 +50,9 @@ $ docker run --rm \
 
 $ tar tzf gitlab.tgz
 ```
+
+## read more
+
+- http://docs.gitlab.com/omnibus/docker/
+
+[1]: https://gitlab.com/
diff --git a/gitlab/docker-compose.yml b/gitlab/docker-compose.yml
index f72dac2..10c174c 100644
--- a/gitlab/docker-compose.yml
+++ b/gitlab/docker-compose.yml
@@ -1,12 +1,15 @@
 gitlab:
   image: gitlab/gitlab-ce
+  hostname: gitlab.example.com
+  environment:
+    GITLAB_OMNIBUS_CONFIG: |
+      external_url 'https://gitlab.example.com'
   ports:
-    - "8443:443"
-    - "8080:80"
-    - "2222:22"
+    - "22:22"
+    - "80:80"
+    - "443:443"
   volumes:
-    - /srv/gitlab/config:/etc/gitlab
-    - /srv/gitlab/logs:/var/log/gitlab
-    - /srv/gitlab/data:/var/opt/gitlab
-  privileged: true
+    - ./gitlab/config:/etc/gitlab
+    - ./gitlab/logs:/var/log/gitlab
+    - ./gitlab/data:/var/opt/gitlab
   restart: always
diff --git a/phpvirtualbox/README.md b/phpvirtualbox/README.md
index 579eb99..fc78359 100644
--- a/phpvirtualbox/README.md
+++ b/phpvirtualbox/README.md
@@ -21,7 +21,7 @@ phpvirtualbox:
 
 > - Make sure you can login `remote-server` with `username:password`.
 > - ISO images can be placed at `/data` directory of `remote-server`.
-> - During the OS installation, you can connect it with RDC program.
+> - During the OS installation, you can connect to it with RDP viewer.
 
 ### vboxweb.service