Updated readme

README.md

@@ -7,6 +7,8 @@ A Docker image based on Ubuntu 20.04 with the Xfce desktop environment,
 
 ## Start an instance
 
+### Docker CLI
+
 ```sh
 docker run \
   --name xubuntu \
@@ -15,7 +17,22 @@ docker run \
   --publish 3322:3322/tcp \
   --publish 3389:3389/tcp \
   --device /dev/dri:/dev/dri \
-  hectormolinero/xubuntu:latest
+  docker.io/hectormolinero/xubuntu:latest
+```
+
+### Docker Compose
+
+```yaml
+version: '3.8'
+services:
+  xubuntu:
+    image: 'docker.io/hectormolinero/xubuntu:latest'
+    shm_size: '2gb'
+    ports:
+      - '3322:3322/tcp'
+      - '3389:3389/tcp'
+    devices:
+      - '/dev/dri:/dev/dri'
 ```
 
 > You will be able to connect to the container via SSH through 3322/tcp port and RDP through 3389/tcp port.
@@ -23,23 +40,6 @@ docker run \
 > **Important:** some software (like Firefox) need the shared memory to be increased, if you
 encounter any problem related to this you may use the `--shm-size` option.
 
-### Using `docker-compose`
-
-```yaml
-version: '3.8'
-services:
-  xubuntu:
-    image: hectormolinero/xubuntu:latest
-    ports:
-      - 3322:3322/tcp
-      - 3389:3389/tcp
-    devices:
-      - /dev/dri:/dev/dri
-    shm_size: 2gb
-    tmpfs:
-      - /tmp
-```
-
 ## Environment variables
 
 * `UNPRIVILEGED_USER_UID`: unprivileged user UID (`1000` by default).