Container tag name fix in examples

README.MD

@@ -11,7 +11,7 @@ installer script, just run a temporary container with `PHPBB_INSTALL=true`
 environment variable:
 
 ```console
-$ docker run -p 8000:80 --name phpbb-install -e PHPBB_INSTALL=true -d phpbb
+$ docker run -p 8000:80 --name phpbb-install -e PHPBB_INSTALL=true -d selim13/phpbb:3.1
 ```
 
 Point your browser to the http://localhost:8000 to begin the 
@@ -38,7 +38,7 @@ You can start a container as follows:
 
 
 ```console
-$ docker run --name phpbb -d phpbb
+$ docker run --name phpbb -d selim13/phpbb:3.1
 ```
 
 By default, it uses SQLite3 as a database backend, so you will need to supply
@@ -47,7 +47,7 @@ it with a database file. It's default path is `/phpbb/sqlite/sqlite.db`.
 You can import it from the temporary installation container above:
 
 ```console
-$ docker run --volumes-from phpbb-install --name phpbb phpbb
+$ docker run --volumes-from phpbb-install --name phpbb -d selim13/phpbb:3.1
 ```
 
 Or just copy it inside container if you have one from previous phpBB
@@ -67,7 +67,7 @@ $ docker run --name phpbb     \
     -e PHPBB_DB_PORT=3306     \
     -e PHPBB_DB_NAME=phpbb    \
     -e PHPBB_DB_USER=phpbb    \
-    -e PHPBB_DB_PASSWD=pass -d phpbb
+    -e PHPBB_DB_PASSWD=pass -d selim13/phpbb:3.1
 ```
 
 ## Environment variables