added export module (#538)

var/docs/docker.md

@@ -17,11 +17,15 @@ Any issues with the container rather than the application itself should be raise
 
 ## Run the docker
 
-    docker run -ti -p 8001:8001 --name kimai2 --rm kimai/kimai2:dev
+```
+docker run -ti -p 8001:8001 --name kimai2 --rm kimai/kimai2:dev
+```
 
 You can then access the site on http://127.0.0.1:8001. If that doesn't work check the IP of your docker:
 
-    docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' kimai2
+```
+docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' kimai2
+```
 
 You can find Kimai at that IP on port 8001.
 
@@ -30,32 +34,42 @@ You can find Kimai at that IP on port 8001.
 When using dock-machine on your Mac, you need to use the IP of your machine. 
 Considering you started the machine named `default`, you find the IP with:
 
-    docker-machine ip default
+```
+docker-machine ip default
+```
 
 ## Running commands in the docker
 
 You can run any command in the container in this fashion once it is started.  Add `-ti` to attach a terminal.
 
-    docker exec -ti kimai2 bash
+```
+docker exec -ti kimai2 bash
+```
 
 ## Create a user and dummy data
 
 See the docs [here](installation.md) for full instructions, but this creates a user admin/admin with all privileges.
 
-    docker exec kimai2 bin/console kimai:create-user admin admin@example.com ROLE_SUPER_ADMIN admin
+```
+docker exec kimai2 bin/console kimai:create-user admin admin@example.com ROLE_SUPER_ADMIN admin
+```
 
 To install the fixtures:
 
-    docker exec kimai2 bin/console kimai:reset-dev
+```
+docker exec kimai2 bin/console kimai:reset-dev
+```
 
 ## Developing against the docker
 
 It is possible to mount your source tree and sqlite DB into the container at run time.  **N.B. The sqlite database needs to writable by the www-data user.** Use ```chown 33:33 kimai.sqlite``` on the host machine.
 
-    docker run --rm -d -p 8001:8001 \
-        -v $(pwd)/src:/opt/kimai/src \
-        -v $(pwd)/var/data/kimai.sqlite:/opt/kimai/var/data/kimai.sqlite \
-        --name kimai2 kimai/kimai2:dev
+```
+docker run --rm -d -p 8001:8001 \
+    -v $(pwd)/src:/opt/kimai/src \
+    -v $(pwd)/var/data/kimai.sqlite:/opt/kimai/var/data/kimai.sqlite \
+    --name kimai2 kimai/kimai2:dev
+```
 
 Now edits in the local file tree will be served by the container and database changes will persist.